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Kim J, Kim H. Chiral Discrimination of Monosaccharides Derivatized with 2-Fluorophenyl Hydrazine Using 19F NMR Spectroscopy. Anal Chem 2023; 95:17726-17732. [PMID: 37984461 DOI: 10.1021/acs.analchem.3c03586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Chiral discrimination of monosaccharides holds significant importance, especially given the growing interest of the pharmaceutical industry in their utilization. However, the majority of existing methods has predominantly centered around chromatographic techniques. In this study, we introduce a 19F NMR-based comprehensive approach for chiral analysis specifically tailored for 15 pairs of aldoses. This technique involves employing sugar hydrazones containing fluorine in combination with chiral octahedral gallium and scandium complexes. By utilizing highly sensitive 19F NMR spectroscopy, the fluorine label in the sugar hydrazone enables accurate differentiation between d and l enantiomers. The efficiency of the newly developed method was demonstrated through its successful application in both quantitative and qualitative analyses of mixtures containing various monosaccharides.
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Affiliation(s)
- Jumi Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Hyunwoo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
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2
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Manir MM, Kim JK, Lee BG, Moon SS. Tea catechins and flavonoids from the leaves of Camellia sinensis inhibit yeast alcohol dehydrogenase. Bioorg Med Chem 2012; 20:2376-81. [PMID: 22377672 DOI: 10.1016/j.bmc.2012.02.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 02/01/2012] [Accepted: 02/01/2012] [Indexed: 11/30/2022]
Abstract
Four new quercetin acylglycosides, designated camelliquercetisides A-D, quercetin 3-O-[α-L-arabinopyranosyl(1→3)][2-O″-(E)-p-coumaroyl][β-D-glucopyranosyl(1→3)-α-L-rhamnopyranosyl(1→6)]-β-D-glucoside (17), quercetin 3-O-[2-O″-(E)-p-coumaroyl][β-D-glucopyranosyl(1→3)-α-L-rhamnopyranosyl(1→6)]-β-D-glucoside (18), quercetin 3-O-[α-L-arabinopyranosyl(1→3)][2-O″-(E)-p-coumaroyl][α-L-rhamnopyranosyl(1→6)]-β-d-glucoside (19), and quercetin 3-O-[2-O″-(E)-p-coumaroyl][α-L-rhamnopyranosyl(1→6)]-β-D-glucoside (20), together with caffeine and known catechins, and flavonoids (1-16) were isolated from the leaves of Camellia sinensis. Their structures were determined by spectroscopic (1D and 2D NMR, IR, and HR-TOF-MS) and chemical methods. The catechins and flavonoidal glycosides exhibited yeast alcohol dehydrogenase (ADH) inhibitory activities in the range of IC(50) 8.0-70.3μM, and radical scavenging activities in the range of IC(50) 1.5-43.8 μM, measured by using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical.
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Affiliation(s)
- Md Maniruzzaman Manir
- Department of Chemistry, Kongju National University, Gongju 314-701, Republic of Korea
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3
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Fu GM, Shi SP, Ip FC, Pang HH, Ip NY. A new carotenoid glycoside from Rehmannia glutinosa. Nat Prod Res 2011; 25:1213-8. [DOI: 10.1080/14786419.2010.514268] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Guang-Miao Fu
- a Department of Biochemistry , State Key Laboratory of Molecular Neuroscience, Molecular Neuroscience Center, Biotechnology Research Institute, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - She-Po Shi
- a Department of Biochemistry , State Key Laboratory of Molecular Neuroscience, Molecular Neuroscience Center, Biotechnology Research Institute, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Fanny C.F. Ip
- a Department of Biochemistry , State Key Laboratory of Molecular Neuroscience, Molecular Neuroscience Center, Biotechnology Research Institute, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Hai-Hong Pang
- a Department of Biochemistry , State Key Laboratory of Molecular Neuroscience, Molecular Neuroscience Center, Biotechnology Research Institute, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Nancy Y. Ip
- a Department of Biochemistry , State Key Laboratory of Molecular Neuroscience, Molecular Neuroscience Center, Biotechnology Research Institute, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
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4
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Dong FY, Cui GH, Zhang YH, Zhu RN, Wu XJ, Sun TT, Wang W. Clematomandshurica saponin E, a new triterpenoid saponin from Clematis mandshurica. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2010; 12:1061-1068. [PMID: 21128147 DOI: 10.1080/10286020.2010.533661] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A new triterpenoid saponin, clematomandshurica saponin E, together with four known saponins were isolated and characterized from the roots and rhizomes of Clematis mandshurica (Ranunculaceae), a commonly used traditional Chinese medicine with anti-inflammatory and antirheumatoid activities. On the basis of spectroscopic analysis, including HR-ESI-MS, IR, 1D, and 2D NMR spectral data and hydrolysis followed by chromatographic analysis, the structure of the new triterpenoid saponin was elucidated as 3-O-α-L-rhamnopyranosyl-(1 → 6)-β-D-glucopyranosyl-(1 → 4)-β-D-glucopyranosyl-(1 → 4)-β-D-ribopyranosyl-(1 → 3)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyranosyl oleanolic acid 28-O-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranoside.
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Affiliation(s)
- Fang-Yan Dong
- Institute of Phytochemistry, Jilin Academy of Chinese Medicine Sciences, Changchun, China
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5
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Hu YC, Ma SG, Yu SS, Wu XF, Li Y. Phenolic glycosides isolated from the bark of Lysidice brevicalyx Wei. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2010; 12:516-521. [PMID: 20552492 DOI: 10.1080/10286020.2010.489818] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Two new compounds, lysidiside S (1) and 7-O-(+)-peltogynol-beta-d-glucopyranoside (2), together with six known phenolic glycosides (3-8) were isolated from the bark of Lysidice brevicalyx Wei. The structures of these compounds were characterized by chemical and spectroscopic methods. The antioxidant activities of compounds 1-8 were evaluated, and compound 3 exhibited remarkable antioxidant activity at concentrations of 10(-4), 10(-5), and 10(-6) mol/l.
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Affiliation(s)
- You-Cai Hu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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6
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Liu YB, Su EN, Li JB, Zhang JL, Yu SS, Qu J, Liu J, Li Y. Steroidal glycosides from Dregea sinensis var. corrugata screened by liquid chromatography-electrospray ionization tandem mass spectrometry. JOURNAL OF NATURAL PRODUCTS 2009; 72:229-237. [PMID: 19203246 DOI: 10.1021/np800048n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The MS fragmentation behavior of the C-21 steroidal glycosides from Dregea sinensis var. corrugata was investigated by positive and negative ion electrospray ionization MS using a multistage tandem mass spectrometer equipped with an ion trap analyzer. The mass fragmentation patterns of steroidal glycosides substituted with an orthoacetate group were summarized, and the fragmentation patterns were applied to the online structure identification of the steroidal glycosides in the extract. Eighteen new C-21 steroidal glycosides were identified by means of HPLC-HRESIMS and HPLC-DAD-ESIMS(n). Three new compounds (1, 4, and 7) were identified by HPLC-DAD-ESIMS(n), and their structures were elucidated by use of 1D and 2D NMR methods. The structures identified by MS are fully consistent with those elucidated by NMR data. The present study shows that HPLC-DAD-ESIMS(n) can be used as an effective tool to rapidly identify compounds and guide the isolation of target compounds from crude plant extracts.
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Affiliation(s)
- Yun-Bao Liu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, No 1 Xian Nong Tan Street, Beijing 100050, People's Republic of China
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7
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Hu Y, Ma S, Li J, Yu S, Qu J, Liu J, Du D. Targeted isolation and structure elucidation of stilbene glycosides from the bark of Lysidice brevicalyx Wei guided by biological and chemical screening. JOURNAL OF NATURAL PRODUCTS 2008; 71:1800-1805. [PMID: 18847246 DOI: 10.1021/np800083x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An efficient procedure based on biological and chemical screening has been performed to investigate the antioxidant constituents of the bark of Lysidice brevicalyx Wei. The procedure allowed the rapid identification of known compounds and tentative characterization of unknown compounds by online LC/UV/ESIMS(n) analyses of the antioxidant fraction. Targeted isolation of the unknown compounds has led to the discovery of seven new stilbene glycosides, named lysidisides L-R (1-7), together with a known stilbene glycoside, (E)-resveratrol 3-O-rutinoside (8). The structures of these compounds were further determined on the basis of spectroscopic and chemical evidence. The antioxidant activities of compounds 1-8 and two related compounds, (E)-polydatin (9) and lysidiside E (11), were evaluated. The known compound (E)-polydatin (9) showed antioxidant activity at concentrations of 10(-4) and 10(-5) mol/L.
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Affiliation(s)
- Youcai Hu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Xiannongtan Street, Beijing 100050, People's Republic of China
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8
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Azuma T, Tanaka Y, Kikuzaki H. Phenolic glycosides from Kaempferia parviflora. PHYTOCHEMISTRY 2008; 69:2743-2748. [PMID: 18922550 DOI: 10.1016/j.phytochem.2008.09.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Revised: 08/29/2008] [Accepted: 09/01/2008] [Indexed: 05/26/2023]
Abstract
Three phenolic glycosides were isolated together with two known flavonol glycosides from the H2O-soluble fraction of rhizomes of Kaempferia parviflora. Their structures were determined to be rel-(5aS,10bS)-5a,10b-dihydro-1,3,5a,9-tetrahydroxy-8-methoxy-6H-benz[b]indeno[1,2-d]furan-6-one 5a-O-[alpha-L-rhamnopyranosyl-(1-->6)-beta-d-glucopyranoside] (1), its rel-5aS,10bR isomer (2), and (2R,3S,4S)-3-O-[alpha-L-rhamnopyranosyl-(1-->6)-beta-d-glucopyranosyl]-3'-O-methyl-ent-epicatechin-(2alpha-->O-->3,4alpha-->4)-(5aS,10bS)-5a,10b-dihydro-1,3,5a,9-tetrahydroxy-8-methoxy-6H-benz[b]indeno[1,2-d]furan-6-one 5a-O-[alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside] (3). The structures were elucidated on the basis of analyses of chemical and spectroscopic evidence.
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Affiliation(s)
- Toshiaki Azuma
- Division of Food and Health Sciences, Graduate School of Human Life Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi, Osaka, Japan
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9
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Liu Y, Qu J, Yu S, Tang W, Liu J, Hu Y, Ma S. Nine novel C-21 steroidal glycosides substituted with orthoacetate from Dregea sinensis var. corrugata. Steroids 2008; 73:184-92. [PMID: 18006029 DOI: 10.1016/j.steroids.2007.09.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 09/19/2007] [Accepted: 09/27/2007] [Indexed: 11/28/2022]
Abstract
Nine novel steroidal glycosides substituted with the orthoacetate groups, compounds 1-5 based on the aglycon of 12-O-acetyl-20-O-benzoyl-dihydrosarcostin 8,14,18-orthoacetate and compounds 6-9 based on the aglycon of 12-O-acetyl-20-O-benzoyl-dihydrosarcostin 14,17,18-orthoacetate, were isolated from Dregea sinensis var. corrugata. Their structures were deduced on the basis of chemical and spectral evidences. Compound 1 showed moderate anti-inflammatory activity.
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Affiliation(s)
- Yunbao Liu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, PR China
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10
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Abstract
New stilbene glycosides, (E)-resveratrol-3-O-alpha-L-rhamnopyranosyl-(1 --> 2)-beta-D-xylopyranoside, was isolated from the MeOH extract of the roots of Pleuropterus ciliinervis Nakai (Polygonaceae). Their structures were determined spectroscopically, particularly by 2D NMR spectroscopic analysis.
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Affiliation(s)
- Ill-Min Chung
- Department of Applied Life science, Kon Kuk University, Seoul 143-701, South Korea
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11
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Liu Y, Tang W, Yu S, Qu J, Liu J, Liu Y. Eight new C-21 steroidal glycosides from Dregea sinensis var. corrugata. Steroids 2007; 72:514-23. [PMID: 17482655 DOI: 10.1016/j.steroids.2007.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2006] [Revised: 02/11/2007] [Accepted: 03/06/2007] [Indexed: 10/23/2022]
Abstract
Eight new steroidal glycosides, dresiosides were isolated from the stems of Dregea sinensis var. corrugate and their structures were deduced on the basis of chemical and spectral evidence. The sugar units of dresiosides were determined as deoxysugars after hydrolysis and isolation from natural glycosides. The absolute configurations of deoxysugars were determined as D on the basis of their optical rotation values in comparison with appropriate standards.
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Affiliation(s)
- Yunbao Liu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, PR China
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12
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Takashima J, Ikeda Y, Komiyama K, Hayashi M, Kishida A, Ohsaki A. New constituents from the leaves of Morinda citrifolia. Chem Pharm Bull (Tokyo) 2007; 55:343-5. [PMID: 17268114 DOI: 10.1248/cpb.55.343] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A new iridoid glycoside, citrifoside (1), and a new anthraquinone, 1,5,15-trimethylmorindol (2), together with 24 known compounds, were isolated from the leaves of Morinda citrifolia. The structures of the new compounds were elucidated by spectral data. 1,5,15-Trimethylmorindol (2) did not show significant cytotoxic activity by itself but showed cytotoxicity when combined with tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), while citrifoside (1) did not show any activity even with TRAIL.
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Affiliation(s)
- Junko Takashima
- Pharmaceuticals Research Division, Mitsubishi Pharma Corporation, Yokohama, Japan.
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13
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Liu Y, Qu J, Yu SS, Hu YC, Huang XZ. Seven new steroidal glycosides from the roots of Cynanchum forrestii. Steroids 2007; 72:313-22. [PMID: 17300821 DOI: 10.1016/j.steroids.2006.11.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Revised: 10/18/2006] [Accepted: 11/28/2006] [Indexed: 11/22/2022]
Abstract
Seven new steroidal glycosides, cynaforrosides K (1), L (2), M (3), N (4), and Q (7), based on a 13,14:14,15-disecopregnane-type aglycone, and cynaforrosides O (5) and P (6) with a 14,15-secopregnane-type aglycone, were isolated from the 95% ethanol extract of the roots of Cynanchum forrestii Schlechter. The structures of new compounds were determined on the basis of spectroscopic and chemical evidence. The sugar units of cynaforrosides K-P contained two moieties of glucoses with the mode of 1-->4 linkage and those of cynaforrosides K-O contained six moieties of sugars.
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Affiliation(s)
- Yue Liu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Peking Union Medical College, Beijing 100050, People's Republic of China
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14
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Tian XY, Wang YH, Liu HY, Yu SS, Fang WS. On the Chemical Constituents of Dipsacus asper. Chem Pharm Bull (Tokyo) 2007; 55:1677-81. [PMID: 18057739 DOI: 10.1248/cpb.55.1677] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Xiao-Yan Tian
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Peking Union Medicinal College and Institute of Materia Medica, Chinese Academy of Medical Sciences
| | - Ying-Hong Wang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Peking Union Medicinal College and Institute of Materia Medica, Chinese Academy of Medical Sciences
| | - Hong-Yue Liu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Peking Union Medicinal College and Institute of Materia Medica, Chinese Academy of Medical Sciences
| | - Shi-Shan Yu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Peking Union Medicinal College and Institute of Materia Medica, Chinese Academy of Medical Sciences
| | - Wei-Shuo Fang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Peking Union Medicinal College and Institute of Materia Medica, Chinese Academy of Medical Sciences
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15
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Fu G, Liu Y, Yu S, Huang X, Hu Y, Chen X, Zhang F. Cytotoxic oxygenated triterpenoid saponins from Symplocos chinensis. JOURNAL OF NATURAL PRODUCTS 2006; 69:1680-6. [PMID: 17190442 DOI: 10.1021/np060160+] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A n-butanol-soluble fraction of an ethanolic extract from the roots of Symplocos chinensis showed cytotoxic activity against several cancer cell lines. Bioassay-guided purification led to the isolation and characterization of eight new triterpenoid saponins, symplocososides L-S (1-8). The structures of 1-8 were elucidated as glycosides based on oxygenated aglycons by spectroscopic and chemical methods. These compounds and their hydrolytic products, along with some additional analogues obtained earlier from S. chinensis roots, were evaluated for cytotoxicity in a small cancer cell panel.
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Affiliation(s)
- Guangmiao Fu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Xiannongtan Street, Beijing 100050, People's Republic of China
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16
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Liu P, Guo H, Tian Y, Wang Q, Guo D. Benzoic acid allopyranosides from the bark of Pseudolarix kaempferi. PHYTOCHEMISTRY 2006; 67:1395-8. [PMID: 16808935 DOI: 10.1016/j.phytochem.2006.05.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Revised: 03/28/2006] [Accepted: 05/11/2006] [Indexed: 05/10/2023]
Abstract
Two benzoic acid allopyranosides, pseudolaroside A and pseudolaroside B, along with seven known compounds were isolated from the bark of Pseudolarix kaempferi. Their structures were determined by analysis of HR-ESI-MS, 1D and 2D NMR spectroscopic data, chemical analysis and comparison to the literature data.
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Affiliation(s)
- Peng Liu
- Division of Pharmacognostical Biotechnology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100083, China
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17
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Tian XY, Wang YH, Yang QY, Liu X, Fang WS, Yu SS. Jacaranone glycosides from Senecio scandens. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2006; 8:125-32. [PMID: 16753793 DOI: 10.1080/10286020500530912] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Bioassay-guided fractionation of the ethanol extract of Senecio scandens led to the isolation of four new compounds 1-4. These compounds were obtained as tautomeric mixture of alpha/beta epimers, but their structures were confirmed unambiguously by 1D and 2D NMR spectra and LC NMR technology. 1H NMR spectra of pure 1alpha and 1beta were furnished by HPLC NMR technology. Compounds 1-4 exhibited moderate cytotoxicities against five tumor cell lines.
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Affiliation(s)
- Xiao-Yan Tian
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Peking Union Medicinal College, and Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China
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18
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Liu Y, Hu Y, Yu S, Fu G, Huang X, Fan L. Steroidal glycosides from Cynanchum forrestii Schlechter. Steroids 2006; 71:67-76. [PMID: 16256157 DOI: 10.1016/j.steroids.2005.08.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2005] [Revised: 07/27/2005] [Accepted: 08/17/2005] [Indexed: 10/25/2022]
Abstract
Nine new steroidal glycosides, cynaforrosides B, C, D, E, and F, based on a 13, 14: 14, 15-disecopregnane-type skeleton, cynaforrosides G, H, and I with a new aglycone named cynaforrogenin A, and cynaforroside J together with three known C21 steroidal glycosides cynatratoside A, hancoside and komaroside C were isolated from the ethanol extract of the roots of Cynanchum forrestii Schlechter. The structures of new compounds were determined on the basis of spectral and chemical evidence. Steroidal glycosides with three kinds of skeletons were isolated from this plant simultaneously. The sugar units of cynaforrosides B-I contained two moieties of glucoses and especially cynaforrosides E-I contained two glucoses with the mode of 1-->6 linkage, which were rare among steroidal glycosides of the genus Cynanchum.
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Affiliation(s)
- Yue Liu
- Key Laboratory of Bioactive Substances, Ministry of Education, Peking Union Medical College, Beijing 100050, People's Republic of China
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19
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Lamble HJ, Heyer NI, Bull SD, Hough DW, Danson MJ. Metabolic pathway promiscuity in the archaeon Sulfolobus solfataricus revealed by studies on glucose dehydrogenase and 2-keto-3-deoxygluconate aldolase. J Biol Chem 2003; 278:34066-72. [PMID: 12824170 DOI: 10.1074/jbc.m305818200] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The hyperthermophilic Archaeon Sulfolobus solfataricus metabolizes glucose by a non-phosphorylative variant of the Entner-Doudoroff pathway. In this pathway glucose dehydrogenase and gluconate dehydratase catalyze the oxidation of glucose to gluconate and the subsequent dehydration of gluconate to 2-keto-3-deoxygluconate. 2-Keto-3-deoxygluconate (KDG) aldolase then catalyzes the cleavage of 2-keto-3-deoxygluconate to glyceraldehyde and pyruvate. The gene encoding glucose dehydrogenase has been cloned and expressed in Escherichia coli to give a fully active enzyme, with properties indistinguishable from the enzyme purified from S. solfataricus cells. Kinetic analysis revealed the enzyme to have a high catalytic efficiency for both glucose and galactose. KDG aldolase from S. solfataricus has previously been cloned and expressed in E. coli. In the current work its stereoselectivity was investigated by aldol condensation reactions between D-glyceraldehyde and pyruvate; this revealed the enzyme to have an unexpected lack of facial selectivity, yielding approximately equal quantities of 2-keto-3-deoxygluconate and 2-keto-3-deoxygalactonate. The KDG aldolase-catalyzed cleavage reaction was also investigated, and a comparable catalytic efficiency was observed with both compounds. Our evidence suggests that the same enzymes are responsible for the catabolism of both glucose and galactose in this Archaeon. The physiological and evolutionary implications of this observation are discussed in terms of catalytic and metabolic promiscuity.
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Affiliation(s)
- Henry J Lamble
- Centre for Extremophile Research, the Department of Biology and Biochemistry, University of Bath, United Kingdom
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20
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Kuroda M, Mimaki Y, Ori K, Koshino H, Nukada T, Sakagami H, Sashida Y. Lucilianosides A and B, two novel tetranor-lanostane hexaglycosides from the bulbs of Chionodoxa luciliae. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00672-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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21
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Li W, Koike K, Asada Y, Yoshikawa T, Nikaido T. Biotransformation of umbelliferone by Panax ginseng root cultures. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01138-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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22
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Li W, Koike K, Asada Y, Hirotani M, Rui H, Yoshikawa T, Nikaido T. Flavonoids from Glycyrrhiza pallidiflora hairy root cultures. PHYTOCHEMISTRY 2002; 60:351-355. [PMID: 12031424 DOI: 10.1016/s0031-9422(02)00093-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three flavonoids named licoagrosides D, E and F together with four known flavonoids, medicarpin 3-O-glucoside, calycosin 7-O-glucoside, formononetin 7-O-(6"-malonylglucoside) and 2'-hydroxyformononetin 7-O-glucoside were isolated from Glycyrrhiza pallidiflora hairy root cultures. Their structures were determined on the basis of spectroscopic evidence. Licoagrosides E and F are the first examples of a 6a-hydroxypterocarpan glycoside and an alpha-O-glycosidic alpha-hydroxydihydrochalcone, respectively.
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Affiliation(s)
- Wei Li
- School of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-city, Chiba 274-8510, Japan
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23
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Triterpenoid saponins from Caryophyllaceae family. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1572-5995(02)80004-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
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24
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Mimaki Y, Kuroda M, Yokosuka A, Sashida Y. A spirostanol saponin from the underground parts of Ruscus aculeatus. PHYTOCHEMISTRY 1999; 51:689-692. [PMID: 10392471 DOI: 10.1016/s0031-9422(99)00076-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A new spirostanol saponin was isolated from the underground parts of Ruscus aculeatus and the structure was assigned as (23S,25R)-spirost-5-ene-3 beta,23-diol 23-O-[O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranoside] on the basis of spectroscopic analysis, including two-dimensional NMR spectroscopic techniques and the result of acid hydrolysis. The saponin is unique in structure having a diglycoside unit at C-23 of the spirostanol skeleton.
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Affiliation(s)
- Y Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan.
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25
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Mimaki Y, Satou T, Kuroda M, Sashida Y, Hatakeyama Y. Steroidal saponins from the bulbs of Lilium candidum. PHYTOCHEMISTRY 1999; 51:567-573. [PMID: 10389269 DOI: 10.1016/s0031-9422(99)00022-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Five new spirostanol saponins and a new furostanol saponin were isolated from the fresh bulbs of Lilium candidum. Their structures were elucidated on the basis of spectroscopic analysis, including two-dimensional NMR spectroscopic techniques and the result of acid hydrolysis. The isolated saponins contained a branched triglycoside moiety assigned as O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D-glucopyranosyl-(1-->6)]-beta - D-glucopyranose with the formation of an O-glycosidic linkage to C-3 of the aglycone as the common structural feature. The inhibitory activity of the saponins on Na+/K+ ATPase was evaluated.
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Affiliation(s)
- Y Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan.
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26
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Mimaki Y, Kuroda M, Ide A, Kameyama A, Yokosuka A, Sashida Y. Steroidal saponins from the aerial parts of Dracaena draco and their cytostatic activity on HL-60 cells. PHYTOCHEMISTRY 1999; 50:805-813. [PMID: 10192965 DOI: 10.1016/s0031-9422(98)00614-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Chemical examination of the aerial parts of Dracaena draco has led to the isolation of a total of nine steroidal saponins, including five new ones. The structures of the new saponins were determined by spectral data and a few chemical transformations to be (23S,24S)-spirosta-5,25(27)-diene-1 beta,3 beta,23,24-tetrol 1-O-{O-(2,3,4-tri-O-acetyl-alpha-L-rhamnopyranosyl)-(1-->2)-alpha-L -arabinopyranosyl} 24-O-beta-D-fucopyranoside, (23S,24S)-spirosta-5,25(27)-diene-1 beta,3 beta, 23,24-tetrol 1-O-{O-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L -arabinopyranoside}, (23S,24S)-spirosta-5,25(27)-diene-1 beta,3 beta,23,24-tetrol 1-O-{O-(4-O- acetyl-alpha-L-rhamnopyranosyl)-(1-->2)-alpha-L-arabinopyransoide} , (23S)-spirosta-5,25(27)-diene-1 beta,3 beta,23-triol 1-O-{O-alpha-L- rhamnopyranosyl)-(1-->2)-alpha-L-arabinopyranoside} and (23S,24S)-spirosta-5,25(27)-diene-1 beta,3 beta,23-triol 1-O-{O-(4-O-acetyl-alpha-L-rhamnopyranosyl)-(1-->2)-alpha-L- arabinopyranoside}. The isolated saponins were evaluated for their cytostatic activity on leukemia HL-60 cells.
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Affiliation(s)
- Y Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Tokyo, Japan.
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27
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Mimaki Y, Kuroda M, Kameyama A, Yokosuka A, Sashida Y. Steroidal saponins from the rhizomes of Hosta sieboldii and their cytostatic activity on HL-60 cells. PHYTOCHEMISTRY 1998; 48:1361-1369. [PMID: 9720315 DOI: 10.1016/s0031-9422(98)00157-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A total of eighteen steroidal saponins were isolated from the rhizomes of Hosta sieboldii, one of which appeared to be the first isolation from a plant source and six to be new compounds. The structures of the new saponins were determined by spectral data and a few chemical transformations to be (25R)-2 alpha, 3 beta-dihydroxy-5 alpha-spirostan-12-one (manogenin) 3-O-¿O-beta-D-glucopyranosyl-(1-->2)-O-beta-D-glucopyranosyl -(1-->4)-beta-D-galactopyranoside¿, (25R)-2 alpha,3 beta-dihydroxy-5 alpha-spirost-9-en-12-one (9,11-dehydromanogenin) 3-O-¿O-beta-D-glucopyranosyl-(1-->2)-O-beta-D- glucopyranosyl-(1-->4)-beta-D-galactopyranoside¿, 9,11-dehydromanogenin 3-O-¿O-beta-D-glucopyranosyl-(1-->2)-O-[O-alpha-L- rhamnopyranosyl-(1-->4)-beta-D-xylopyranosyl-(1-->3)]-O-beta-D- glucopyranosyl-(1-->4)-beta-D-galactopyranoside¿, (25R)-2 alpha,3 beta-dihydroxy-26-beta-D-glucopyranosyloxy-22-methoxy-5 alpha-furostan-12-one 3-O-¿O-beta-D-glucopyranosyl-(1-->2)-O-[beta-D-xylopyranosyl-(1-->3)]-O- beta-D-glucopyranosyl-(1-->4)-beta-D-galactopyranoside¿, (25R)-2 alpha, 3 beta-dihydroxy-26-beta-D-glucopyranosyloxy-22-methoxy-5 alpha-furost-9-en-12-one 3-O-¿O-beta-D-glucopyranosyl-(1-->2)-O-[beta-D-xylopyranosyl-(1-->3)]-O- beta-D-glucopyranosyl-(1-->4)-beta-D-galactopyranoside¿ and (25R)-5 alpha-spirostan-2 alpha,3 beta,12 beta-triol 3-O-¿O-alpha-L- rhamnopyranosyl-(1-->2)-beta-D-galactopyranoside¿, respectively. Cytostatic activity of the isolated saponins on leukaemia HL-60 cells was examined.
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Affiliation(s)
- Y Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan.
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28
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Mimaki Y, Kuroda M, Kameyama A, Yokosuka A, Sashida Y. Steroidal saponins from the underground parts of Ruscus aculeatus and their cytostatic activity on HL-60 cells. PHYTOCHEMISTRY 1998; 48:485-493. [PMID: 9654776 DOI: 10.1016/s0031-9422(98)00036-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Phytochemical examination of the underground parts of Ruscus aculeatus has been undertaken as part of systematic study of plants of the Liliaceae. Six new spirostanol saponins and five new furostanol saponins were isolated, and their structures were assigned on the basis of spectroscopic analysis, including two-dimensional NMR techniques, and hydrolysis. Ruscogenin diglycoside with three acetyl groups attached to the inner galactosyl moiety and its corresponding 26-glucosyloxyfurostanol saponin showed cytostatic activity on leukemia HL-60 cells.
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Affiliation(s)
- Y Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and life Science, Japan
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29
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Mimaki Y, Kuroda M, Takaashi Y, Sashida Y. Steroidal saponins from the leaves of Cordyline stricta. PHYTOCHEMISTRY 1998; 47:79-85. [PMID: 9429320 DOI: 10.1016/s0031-9422(97)00545-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Three new spirostanol saponins and two new furostanol saponins were isolated from the fresh leaves of Cordyline stricta. Their structures were elucidated on the basis of spectroscopic analysis, including various 2D NMR techniques, hydrolysis, and by comparison of spectral data of known compounds. Two of the isolated saponins contained a new branched triglycoside moiety assigned as O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D-xylopyranosyl-(1-->3)]-beta- D- xylopyranose with the formation of an O-glycosidic linkage to C-1 of the aglycone.
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Affiliation(s)
- Y Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan
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30
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Kuroda M, Mimaki Y, Sashida Y, Hirano T, Oka K, Dobashi A, Li HY, Harada N. Novel cholestane glycosides from the bulbs of Ornithogalum saundersiae and their cytostatic activity on leukemia HL-60 and MOLT-4 cells. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00750-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Mimaki Y, Kameyama A, Kuroda M, Sashida Y, Hirano T, Oka K, Koike K, Nikaido T. Steroidal glycosides from the underground parts of Hosta plantaginea var. japonica and their cytostatic activity on leukaemia HL-60 cells. PHYTOCHEMISTRY 1997; 44:305-310. [PMID: 9004544 DOI: 10.1016/s0031-9422(96)00548-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A new C22-steroid glycoside was isolated from the underground parts of Hosta plantaginea var. japonica, together with a known furostanol saponin and three known spirostanol saponins. The structure of the new steroid glycoside was characterized by spectroscopic analysis and acid-catalysed hydrolysis as 2 alpha, 3 beta, 16 beta-trihydroxy-5 alpha-pregn-20(21)-ene-carboxylic acid gamma-lactone 3-O-¿O-beta-D-glucopyranosyl-(1-->2)-O-beta-D-glucopyranosyl-(1--> 4)-beta-D-galactopyranoside¿. The isolated compounds were assayed for their cytostatic activity on leukaemia HL-60 cells. The spirostanol saponins showed cytostatic activity in a dose-dependent manner with the IC50 values ranging between 1 and 3 micrograms ml-1.
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Affiliation(s)
- Y Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan
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32
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Satou T, Mimaki Y, Kuroda M, Sashida Y, Hatakeyama Y. A pyrroline glucoside ester and steroidal saponins from Lilium martagon. PHYTOCHEMISTRY 1996; 41:1225-1230. [PMID: 8728721 DOI: 10.1016/0031-9422(95)00723-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A new phenylpropanoid ester of a pyrroline derivative and two new steroidal saponins were isolated from the fresh bulbs of Lilium martagon, along with several previously known compounds. The structures of the new compounds were determined by spectroscopic data, hydrolysis, and by comparison with spectral data of known compounds to be (-)-5-hydroxy-3-methyl-3-pyrrolin-2-one 5-O-(6-O-p-coumaroyl-beta-D- glucopyranoside), (25S)-spirost-5-ene-3 beta,17 alpha, 27-triol 3-O-[O-beta-D-glucopyranosyl-(1-->2)-O-beta-D-glucopyranosyl- (1-->4)-beta-D-glucopyranoside] and (25S)-5 alpha-spirostane-3 beta,17 alpha,27-triol 3-O-[O-beta-D-glucopyranosyl-(1-->2)-O-beta-D-glucopyranosyl-(1-->4)-bet a-D- glucopyranoside], respectively. Lilium martagon crosses well with L. hansonii to produce a valuable garden hybrid lily. In this study, the secondary metabolites of L. martagon were revealed to be closely related to those of L. hansonii, giving a good example of the correlation between the secondary metabolites and cross-compatibility.
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Affiliation(s)
- T Satou
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan
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33
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Kuroda M, Mimaki Y, Kameyama A, Sashida Y, Nikaido T. Steroidal saponins from Allium chinense and their inhibitory activities on cyclic AMP phosphodiesterase and Na+/K+ ATPase. PHYTOCHEMISTRY 1995; 40:1071-1076. [PMID: 7492369 DOI: 10.1016/0031-9422(95)00423-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The saponin fraction prepared from the methanolic extract of Allium chinense bulbs exhibited inhibitory activities on cyclic AMP phosphodiesterase (cAMP PDE) (43.5%) and Na+/K+ ATPase (59.3%) at a sample concentration of 100 micrograms ml-1, respectively. Attempted purification of the active fraction through column chromatography on silica gel and ODS silica gel resulted in the isolation of six steroidal saponins, one of which appeared to be a new compound and one to be the first isolation from a natural source. (25R,S)-5 alpha-Spirostan-3 beta-ol tetrasaccharide showed inhibitory activities on both cAMP PDE and Na+/K+ ATPase, while (25R)-3 beta-hydroxy-5 alpha-spirostan-6-one di- and tri-saccharides inhibited only cAMP PDE.
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Affiliation(s)
- M Kuroda
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan
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34
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Inoue T, Mimaki Y, Sashida Y, Nishino A, Satomi Y, Nishino H. Steroidal glycosides from Allium macleanii and A. senescens, and their inhibitory activity on tumour promoter-induced phospholipid metabolism of HeLa cells. PHYTOCHEMISTRY 1995; 40:521-525. [PMID: 7546561 DOI: 10.1016/0031-9422(95)00223-t] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A new polyhydroxylated cholestane trisdesmoside and a new spirostanol pentasaccharide, together with five known spirostanol saponins, were isolated from the bulbs of Allium macleanii, and two known spirostanol saponins were isolated from the bulbs of A. senescens. The identification and structural assignments of the steroidal glycosides were performed by spectroscopic analysis and hydrolysis. Furthermore, the isolated compounds were evaluated for inhibitory activity on 12-O-tetradecanoylphorbol-13-acetate (TPA)-stimulated 32P-incorporation into phospholipids of HeLa cells, which is recognized as an excellent primary screening test to identify new antitumour-promoter compounds.
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Affiliation(s)
- T Inoue
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan
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35
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Mimaki Y, Kubo S, Kinoshita Y, Sashida Y, Song LG, Nikaido T, Ohmoto T. Lanosterol and 27-norlanosterol oligosaccharides from the bulbs of Chionodoxa gigantea. PHYTOCHEMISTRY 1993; 34:791-7. [PMID: 7764152 DOI: 10.1016/0031-9422(93)85361-t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
New lanosterol and 27-norlanosterol oligosaccharides were found in the bulbs of Chionodoxa gigantea. Their structures were established mainly by extensive 2D NMR analysis as well as by comparison with spectral data of known compounds. The inhibition of cyclic AMP phosphodiesterase by the lanosterol derivatives was assayed as the primary screening test to find new medicinal materials.
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Affiliation(s)
- Y Mimaki
- Tokyo College of Pharmacy, Japan
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36
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37
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Mimaki Y, Sashida Y, Nakamura O, Nikaido T, Ohmoto T. Steroidal saponins from the bulbs of Lilium regale and L. henryi. PHYTOCHEMISTRY 1993; 33:675-682. [PMID: 7764061 DOI: 10.1016/0031-9422(93)85472-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Two new and three known steroidal saponins were isolated from the fresh bulbs of Lilium regale and two known saponins from those of L. henryi. The structures of the new saponins were established by extensive spectral data, hydrolysis and chemical correlation as (25R)-27-O-[(S)-3-hydroxy-3-methylglutaroyl]-spirost-5 -ene-3 beta,27-diol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D-glucopyranosyl-(1-->3)]- beta-D-glucopyranoside and (25S)-spirost-5-ene-3 beta,17 alpha,27-triol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D-glucopyranosyl-(1-->2)-O- beta-D-glucopyranosyl-(1-->4)]-beta-D-glucopyranoside. Inhibitory activity of the saponins on cyclic AMP phosphodiesterase was evaluated.
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Affiliation(s)
- Y Mimaki
- Tokyo College of Pharmacy, Japan
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38
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Little MR. The separation of enantiomeric sugars by chromatographic methods. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 1985; 11:195-202. [PMID: 3905928 DOI: 10.1016/0165-022x(85)90001-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This paper has reviewed the number of chromatographic methods by which one may determine the absolute configuration of sugars. Both indirect methods (converting the enantiomeric pair into diastereomers) and direct methods (using chiral stationary phases) have been discussed. Resolving reagents for the indirect methods include chiral hydroxy compounds, chiral amines, and chiral thiols; with subsequent separation of the diastereomers either by gas-liquid chromatography or by high pressure liquid chromatography. Direct methods discussed have exclusively utilized chiral substitution of organopolysiloxane phases for the separation of enantiomeric sugars as volatile derivatives by gas-liquid chromatography.
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Oshima R, Kumanotani J. Structural studies of plant gum from sap of the lac tree, Rhus vernicifera. Carbohydr Res 1984. [DOI: 10.1016/0008-6215(84)85105-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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Oshima R, Kumanotani J, Watanabe C. Gas-liquid chromatographic resolution of sugar enantiomers as diastereoisomeric methylbenzylaminoalditols. J Chromatogr A 1983. [DOI: 10.1016/s0021-9673(01)87990-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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