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Zhang Y, Yu YY, Peng F, Duan WT, Wu CH, Li HT, Zhang XF, Shi YS. Neolignans and Diarylheptanoids with Anti-Inflammatory Activity from the Rhizomes of Alpinia zerumbet. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:9229-9237. [PMID: 34357758 DOI: 10.1021/acs.jafc.1c02271] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The dried leaves and rhizomes of Alpinia zerumbet have been traditionally used as food and medicine. Anti-inflammatory activity-guided phytochemical investigation into the rhizomes of A. zerumbet led to the isolation of 17 compounds including 10 neolignans (1-10, 1a, 1b, 2a, 2b, 3a, 3b, 4, and 5 are new compounds) and seven diarylheptanoids (11-17) in which 1-3 were three pairs of enantiomers. 4 was only one enantiomer and 5 was a racemic mixture. Compounds 1a, 1b, 2a, and 2b incorporated an 8',9'-dinorneolignan skeleton, which was rare in the lignan family. The planar structures of these compounds were elucidated by extensive analyses of spectroscopic data. The relative and absolute configurations were determined by the time-dependent density functional theory (TDDFT)-based electronic circular dichroism (ECD) calculation method. The 95% ethanol extract and ethyl acetate extract of A. zerumbet were found to show anti-inflammatory activity against croton oil-induced ear edema in mice with inhibition rates of 20.0 and 47.6% at a dose of 80 mg/kg, respectively. Bioassays showed that compounds 1a, 1b, 2a, 2b, and 12 moderately inhibited nitric oxide (NO) production in lipopolysaccharide (LPS)-induced RAW264.7 cells with IC50 values of 3.62, 7.63, 6.51, 5.60, and 8.33 μM, respectively.
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Affiliation(s)
- Yan Zhang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, People's Republic of China
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, People's Republic of China
| | - Yuan-Yuan Yu
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, People's Republic of China
| | - Fei Peng
- Hebei Key Laboratory of Active Components and Functions in Natural Products, Hebei Normal University of Science and Technology, Qinhuangdao 066000, People's Republic of China
| | - Wen-Tao Duan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Chuan-Hai Wu
- Department of Ocean Science, Division of Life Science and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory, The Hong Kong University of Science and Technology, Hong Kong, People's Republic of China
| | - Hao-Tian Li
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, People's Republic of China
| | - Xu-Fu Zhang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Yu-Sheng Shi
- Department of Ocean Science, Division of Life Science and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory, The Hong Kong University of Science and Technology, Hong Kong, People's Republic of China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, People's Republic of China
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Maneenet J, Omar AM, Sun S, Kim MJ, Daodee S, Monthakantirat O, Boonyarat C, Chulikhit Y, Awale S. Benzylisoquinoline alkaloids from Nelumbo nucifera Gaertn. petals with antiausterity activities against the HeLa human cervical cancer cell line. Z NATURFORSCH C 2021; 76:401-406. [PMID: 34019754 DOI: 10.1515/znc-2020-0304] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 05/02/2021] [Indexed: 11/15/2022]
Abstract
Ethanolic extract of Nelumbo nucifera petals showed preferential cytotoxic activity against HeLa human cervical cancer cell line with a PC50 value of 10.4 μg/mL. This active extract was subjected to a phytochemical investigation study which led to the isolation of nine benzylisoquinoline alkaloids (1-9). The isolated compounds exhibited potent antiausterity activities. Moreover, under nutrient-deprived conditions, (-)-lirinidine (8) induced remarkable alterations in HeLa cell morphology including cell shrinkage and plasma blebbing leading to total cell death within 10 h. Mechanistically, 8 was found to inhibit Akt/mTOR signaling pathway. It also induced apoptosis by promoting caspase-3 activation and inhibiting Bcl-2 expression. Therefore, benzylisoquinoline alkaloids skeleton can be considered as a promising scaffold for the anticancer drug development against cervical cancer.
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Affiliation(s)
- Juthamart Maneenet
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan.,Graduate School of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
| | - Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
| | - Supawadee Daodee
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Orawon Monthakantirat
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Chantana Boonyarat
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Yaowared Chulikhit
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
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Zhang L, Wang XL, Wang B, Zhang LT, Gao HM, Shen T, Lou HX, Ren DM, Wang XN. Lignans from Euphorbia hirta L. Nat Prod Res 2020; 36:26-36. [PMID: 32375507 DOI: 10.1080/14786419.2020.1761358] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Five new lignans, euphorhirtins A-D (1-4), 5-methoxyvirgatusin (5), three artefacts, 7S-ethoxyisolintetralin (6), 7R-ethoxyisolintetralin (7), and 7R-ethoxy-3-methoxyisolintetralin (8), together with 13 known ones (9-21) were isolated from the medicinal plant Euphorbia hirta L. The structures of the compounds were elucidated by means of extensive spectroscopic analysis, including 1D and 2D NMR and HR-ESI-MS experiments. The absolute configurations of compound 1 was determined by ECD calculation. The isolates were evaluated for their inhibitory effects against the proliferation of the cancer cell lines (Hep G2, A549, and DU145) and compounds 14 and 18 showed inhibitory activity against the Hep G2 cells with IC50 values 7.2 ± 0.17 and 8.5 ± 0.36 μM.
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Affiliation(s)
- Ling Zhang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
| | - Xiao-Ling Wang
- The Second Hospital of Shandong University, Jinan, P. R. China
| | - Bin Wang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
| | - Long-Teng Zhang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
| | - Hui-Min Gao
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
| | - Tao Shen
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
| | - Dong-Mei Ren
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
| | - Xiao-Ning Wang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, P. R. China
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Fang ZF, Zhang T, Cao XQ, Shi L. Novel sesquilignan and lignan glycoside from the twigs and leaves of Illicium majus. Fitoterapia 2018; 129:42-46. [DOI: 10.1016/j.fitote.2018.06.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/13/2018] [Accepted: 06/14/2018] [Indexed: 11/28/2022]
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Wu Z, Lai Y, Zhou L, Wu Y, Zhu H, Hu Z, Yang J, Zhang J, Wang J, Luo Z, Xue Y, Zhang Y. Enantiomeric Lignans and Neolignans from Phyllanthus glaucus: Enantioseparation and Their Absolute Configurations. Sci Rep 2016; 6:24809. [PMID: 27126373 PMCID: PMC4850383 DOI: 10.1038/srep24809] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 04/05/2016] [Indexed: 12/04/2022] Open
Abstract
Eight pairs of enantiomeric neolignans, norlignans, and sesquineolignans (1a/1b–8a/8b), together with five known neolignans (9a/9b and 10–12), have been isolated from 70% acetone extract of the whole plants of Phyllanthus glaucus Wall. (Euphorbiaceae). The racemic or partial racemic mixtures were successfully separated by chiral HPLC using different types of chiral columns with various mobile phases. Their structures were elucidated on the basis of extensive spectroscopic data. The absolute configurations of 2a/2b were determined by computational analysis of their electronic circular dichroism (ECD) spectrum, and the absolute configurations of other isolates were ascertained by comparing their experimental ECD spectra and optical rotation values with those of structure-relevant compounds reported in literatures. Compounds 4a/4b featured unique sesquineolignan skeletons with a novel 7-4′-epoxy-8′-8′′/7′-2′′ scaffold, consisting of an aryltetrahydronaphthalene and a dihydrobenzofuran moiety. The planar structures of compounds 2, 3, 7, and 8 were documented previously; however, their absolute configurations were established for the first time in this study. The antioxidant activities of 1a/1b–8a/8b were evaluated using DPPH free radical scavenging assay, and the results demonstrated that compounds 1b and 3b showed potent DPPH radical scavenging activities with IC50 values of 5.987 ± 1.212 and 9.641 ± 0.865 μg/mL, respectively.
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Affiliation(s)
- Zhaodi Wu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Yongji Lai
- Department of Pharmacy, the Central Hospital of Wuhan, Wuhan 430014, Hubei Province, People's Republic of China
| | - Lei Zhou
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Ye Wu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Hucheng Zhu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Zhengxi Hu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Jing Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Jinwen Zhang
- Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Jianping Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Zengwei Luo
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Yongbo Xue
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
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Yedukondalu N, Gupta G, R.Nadkarni J, Gupta VK, Syed SH, Ali A. Divergent synthesis of prenylated carbazole alkaloid (+)-S-mahanimbine led to the discovery of a notch activator. RSC Adv 2016. [DOI: 10.1039/c6ra16531a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Mahanimbine a carbazole alkaloid transformed into (2–9) by POCl3 + DMF, further it screened against Notch pathway activation in which the compound 8 exhibited an EC50 value of 0.85 μM. It also inhibited K562 HL cell proliferation and colony formation.
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Affiliation(s)
- Nalli Yedukondalu
- Academy of Scientific & Innovative Research (AcSIR)
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180001
- India
- Natural Product Chemistry Division
| | - Gourav Gupta
- Academy of Scientific & Innovative Research (AcSIR)
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180001
- India
- Pharmacology Division
| | - Janhavi R.Nadkarni
- Pharmacology Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180001
- India
| | - Vivek Kumar Gupta
- Post-Graduate Department of Physics & Electronics
- University of Jammu
- Jammu Tawi 180 006
- India
| | - Sajad Hussain Syed
- Academy of Scientific & Innovative Research (AcSIR)
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180001
- India
- Pharmacology Division
| | - Asif Ali
- Academy of Scientific & Innovative Research (AcSIR)
- CSIR-Indian Institute of Integrative Medicine
- Jammu 180001
- India
- Natural Product Chemistry Division
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7
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Nalli Y, Khajuria V, Gupta S, Arora P, Riyaz-Ul-Hassan S, Ahmed Z, Ali A. Four new carbazole alkaloids fromMurraya koenigiithat display anti-inflammatory and anti-microbial activities. Org Biomol Chem 2016; 14:3322-32. [DOI: 10.1039/c6ob00267f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four new and 18 known carbazole alkaloids were isolated from CHCl3 : MeOH crude extracts of the stem and leaves ofMurraya koenigii(Linn.) Spreng, and evaluated for their anti-inflammatory and antimicrobial activity.
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Affiliation(s)
- Yedukondalu Nalli
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Integrative Medicine
- Jammu-Tawi
- India
- Natural Product Chemistry Division
| | - Vidushi Khajuria
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Integrative Medicine
- Jammu-Tawi
- India
- Inflammation Pharmacology Division
| | - Shilpa Gupta
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Integrative Medicine
- Jammu-Tawi
- India
- Inflammation Pharmacology Division
| | - Palak Arora
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Integrative Medicine
- Jammu-Tawi
- India
- Microbial Biotechnology Division
| | - Syed Riyaz-Ul-Hassan
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Integrative Medicine
- Jammu-Tawi
- India
- Microbial Biotechnology Division
| | - Zabeer Ahmed
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Integrative Medicine
- Jammu-Tawi
- India
- Inflammation Pharmacology Division
| | - Asif Ali
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Integrative Medicine
- Jammu-Tawi
- India
- Natural Product Chemistry Division
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8
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Schuster C, Julich-Gruner KK, Schnitzler H, Hesse R, Jäger A, Schmidt AW, Knölker HJ. Total Syntheses of Murrayamine E, I, and K. J Org Chem 2015; 80:5666-73. [DOI: 10.1021/acs.joc.5b00630] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Schuster
- Department Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | | | - Heinrich Schnitzler
- Department Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Ronny Hesse
- Department Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Anne Jäger
- Department Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Arndt W. Schmidt
- Department Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
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Schmidt AW, Reddy KR, Knölker HJ. Occurrence, Biogenesis, and Synthesis of Biologically Active Carbazole Alkaloids. Chem Rev 2012; 112:3193-328. [PMID: 22480243 DOI: 10.1021/cr200447s] [Citation(s) in RCA: 899] [Impact Index Per Article: 74.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Arndt W. Schmidt
- Department Chemie, Technische Universität Dresden,
Bergstrasse 66, 01069 Dresden, Germany
| | - Kethiri R. Reddy
- Department Chemie, Technische Universität Dresden,
Bergstrasse 66, 01069 Dresden, Germany
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden,
Bergstrasse 66, 01069 Dresden, Germany
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Abbate S, Lebon F, Longhi G, Morelli CF, Ubiali D, Speranza G. Vibrational and electronic circular dichroism spectroscopies and DFT calculations for the assignment of the absolute configuration of hydroxy-substituted 2-tetralols. RSC Adv 2012. [DOI: 10.1039/c2ra21080k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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11
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Berkessel A, Reichau S, von der Höh A, Leconte N, Neudörfl JM. Light-Induced Enantioselective Hydrogenation Using Chiral Derivatives of Casey’s Iron–Cyclopentadienone Catalyst. Organometallics 2011. [DOI: 10.1021/om200459s] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Červinka O, Fusek J. Konfigurationsbeziehungen zwischen Alkylarylmethanolen und Alkylarylmethylaminomethanen. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19680080410] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Kwit M, Gawronski J, Boyd D, Sharma N, Kaik M, More O'Ferrall R, Kudavalli J. Toluene Dioxygenase-Catalyzed Synthesis of cis-Dihydrodiol Metabolites from 2-Substituted Naphthalene Substrates: Assignments of Absolute Configurations and Conformations from Circular Dichroism and Optical Rotation Measurements. Chemistry 2008; 14:11500-11. [DOI: 10.1002/chem.200801686] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Takahashi Y, Yamada M, Kubota T, Fromont J, Kobayashi J. Metachromins R-T, New Sesquiterpenoids from Marine Sponge Spongia sp. Chem Pharm Bull (Tokyo) 2007; 55:1731-3. [DOI: 10.1248/cpb.55.1731] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yohei Takahashi
- Graduate School of Pharmaceutical Sciences, Hokkaido University
| | - Mika Yamada
- Graduate School of Pharmaceutical Sciences, Hokkaido University
| | - Takaaki Kubota
- Graduate School of Pharmaceutical Sciences, Hokkaido University
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15
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Bartlett L, Klyne W, Dastoor NJ, Schmid H, Hrbek J, Snatzkec G. Chiroptische Eigenschaften und Äquilibrierungen stereoisomerer Yohimbane und ihrer 17-Ketoderivate. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19710540503] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Enantioselective addition of organolithium reagents to 3,4-dihydroisoquinoline in the presence of (−)-sparteine as an external ligand. Application for the synthesis of isoquinoline alkaloids. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00233-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Garduño-Ramírez ML, Trejo A, Navarro V, Bye R, Linares E, Delgado G. New modified eremophilanes from the roots of Psacalium radulifolium. JOURNAL OF NATURAL PRODUCTS 2001; 64:432-435. [PMID: 11325222 DOI: 10.1021/np000385z] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The investigation of the chemical constituents from the roots of Psacalium radulifolium, a member of the matarique complex of medicinal plants, which includes several members of the Asteraceae, resulted in the isolation of four new modified eremophilanes: radulifolin A (4), epi-radulifolin A (5), radulifolin B (6), and radulifolin C (7), together with the known natural substances cacalol, cacalone, epi-cacalone, O-methyl-1,2-dehydrocacalol, adenostin A, decompostin, and neoadenostylone. Antimicrobial evaluation of the extracts and the isolated compounds indicated that cacalol was the major active compound.
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Affiliation(s)
- M L Garduño-Ramírez
- Instituto de Química de la Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, México, D. F
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Rumbero A, Borreguero I, Sinisterra JV, Alcántara AR. Acyclic phenylalkanediols as substrates for the study of enzyme recognition: synthesis of substrates and enzymatic resolution via hydrolysis and transesterification. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00941-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Smith HE. Chiroptical Properties of the Benzene Chromophore. A Method for the Determination of the Absolute Configurations of Benzene Compounds by Application of the Benzene Sector and Benzene Chirality Rules. Chem Rev 1998; 98:1709-1740. [PMID: 11848945 DOI: 10.1021/cr9410124] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Howard E. Smith
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
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20
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Gray DG, Harkness BR. Chiral Nematic Mesophases of Lyotropic and Thermotropic Cellulose Derivatives. PARTIALLY ORDERED SYSTEMS 1994. [DOI: 10.1007/978-1-4613-8333-8_9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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21
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Speranza G, Manitto P, Monti D, Lianza F. Feroxidin, a novel 1-methyltetralin derivative isolated from cape aloe. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)89030-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Sur S, Colpa J. Optically active free radicals: circular dichroism of vitamin E acetate radical cation. Chem Phys Lett 1986. [DOI: 10.1016/0009-2614(86)80611-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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El-Abadelah M, Sabri S, Nazer M, Za'ater M. Synthesis of chiroptical properties of some N-(3-methyl-2-quinoxaloyl) l-amino acids and their dioxides. Tetrahedron 1976. [DOI: 10.1016/0040-4020(76)80148-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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