1
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Kiganda I, Wieske LHE, Nchiozem-Ngnitedem VA, Chalo D, Umereweneza D, Ndakala A, Herrebout W, Xiong R, Karpiński TM, Yenesew A, Erdelyi M. Antimicrobial Dihydroflavonols and Isoflavans Isolated from the Root Bark of Dalbergia gloveri. JOURNAL OF NATURAL PRODUCTS 2024; 87:2263-2271. [PMID: 39255387 DOI: 10.1021/acs.jnatprod.4c00690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Three new dihydroflavonols, gloverinols A-C (1-3), a new flavon-3-ol, gloverinol D (4), two new isoflavans, gloveriflavan A (5) and B (6), and seven known compounds were isolated from the root bark of Dalbergia gloveri. The structures of the isolates were elucidated by using NMR, ECD, and HRESIMS data analyses. Among the isolated compounds, gloverinol B (2), gloveriflavan B (6), and 1-(2,4-dihydroxyphenyl)-3-hydroxy-3-(4-hydroxyphenyl)-1-propanone (10) were the most active against Staphylococcus aureus, with MIC values of 9.2, 18.4, and 14.2 μM, respectively.
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Affiliation(s)
- Ivan Kiganda
- Department of Chemistry, University of Nairobi, P.O. BOX 30197, 30197-00100 Nairobi, Kenya
- Department of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Lianne H E Wieske
- Department of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | | | - Duncan Chalo
- Department of Biology, University of Nairobi, P.O. BOX 30197, 30197-00100 Nairobi, Kenya
| | - Daniel Umereweneza
- Departmnet of Chemistry, College of Science and Technology, University of Rwanda, P.O. Box 3900, Kigali, Rwanda
| | - Albert Ndakala
- Department of Chemistry, University of Nairobi, P.O. BOX 30197, 30197-00100 Nairobi, Kenya
| | - Wouter Herrebout
- Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium
| | - Ruisheng Xiong
- Department of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Tomasz M Karpiński
- Department of Medical Microbiology, Poznań University of Medical Sciences, Rokietnicka 10, 60-806 Poznań, Poland
| | - Abiy Yenesew
- Department of Chemistry, University of Nairobi, P.O. BOX 30197, 30197-00100 Nairobi, Kenya
| | - Mate Erdelyi
- Department of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
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2
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Kang B, Ikeda K. 4-Dimethylaminopyridine (DMAP), A Superior Mediator for Morita-Balylis-Hillman Reaction-Triggered Annulative Condensation of Salicylaldehydes and Acrylonitrile to Form 3-Cyano-2H-chromenes. Chem Pharm Bull (Tokyo) 2023; 71:318-325. [PMID: 36805528 DOI: 10.1248/cpb.c23-00068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
We unveiled superior base mediators for the annulative condensation of salicylaldehydes and acrylonitrile to give 3-cyano-2H-chromenes, which has been mediated only by 1,4-diazabicyclo[2.2.2]octane (DABCO) over the past two decades. The reactions were most efficiently mediated by 4-dimethylaminopyridine (DMAP), which yielded 3-cyano-2H-chromenes in higher yields than DABCO in most cases. We also confirmed that the reaction remained high yielding in a decagram-scale experiment with a catalytic amount of DMAP. The utility of this reaction was also exemplified by derivatization of an obtained 3-cyano-2H-chromene into a known 2H-chromene-3-carboxylic acid, which was previously synthesized with a non-readily available reagent.
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Affiliation(s)
- Bubwoong Kang
- Graduate School of Agricultural Science, Kobe University
| | - Kaede Ikeda
- Graduate School of Agricultural Science, Kobe University
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3
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Chen J, Zhou S, Zhang X, Zhao H. S-3′-hydroxy-7′, 2′, 4′-trimethoxyisoxane, a novel ferroptosis inducer, promotes NSCLC cell death through inhibiting Nrf2/HO-1 signaling pathway. Front Pharmacol 2022; 13:973611. [PMID: 36105203 PMCID: PMC9465255 DOI: 10.3389/fphar.2022.973611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/03/2022] [Indexed: 12/05/2022] Open
Abstract
Background: Ferroptosis is a newly discovered and promising non-apoptotic programmed cell death (PCD), and inducing ferroptosis in cancer cells could open up a novel avenue for drug screening and cancer therapy. S-3′-hydroxy-7′, 2′, 4′-trimethoxyisoxane (ShtIX), a new isoflavane compound, has been reported to possess cytotoxicity in non-small cell lung cancer (NSCLC). The aim of this research is to explore the ShtIX-induced cell death form and its underlying molecular mechanism in NSCLC cells. Methods: Cell proliferation, cell cycle arrest, and cell death tests were used to assess the ability of ShtIX to kill NSCLC cells. Iron metabolism, Fe2+ content, reactive oxygen species (ROS) production, lipid peroxide (MDA) level, glutathione (GSH) level, and glutathione peroxidase 4 (GPX4) level were used to determine ferroptosis caused by ShtIX. We employed western blot, quantitative real-time PCR, and Nrf2 interference in NSCLC cells to investigate the roles of Nrf2/HO-1 in ShtIX-induced ferroptosis. In a xenograft nude mouse model, the anticancer efficacy of ShtIX and the function of ferroptosis were studied. Results: Our research shows that ShtIX can selectively kill NSCLC cells while sparing normal cells and that ShtIX-induced cell death can be efficiently reversed by the ferroptosis inhibitors and the iron chelator, but not by other cell death inhibitors. After cells were treated with ShtIX, there was an increase in Fe2+ content and lipid peroxidation accumulation, as well as a drop in GSH and GPX4 levels, all of which are indicators of ferroptosis. ShtIX also reduced the expression of Nrf2 and HO-1, and genetic Nrf2 silencing in NSCLC enhanced the effect of ShtIX-induced ferroptosis. Additionally, ShtIX retards tumor growth and induced ferroptosis through Nrf2/HO-1 signal pathway in the A549 xenograft model, whereas Fer-1 lessens the anticancer effect. Conclusion: This work provided the evidence that ShtIX caused ferroptosis in NSCLC cells, and inhibiting the Nrf2/HO-1 pathway can considerably exacerbate the effect of ShtIX-induced ferroptosis. The study establishes ShtIX as a promising natural ferroptosis inducer for the treatment of NSCLC.
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Affiliation(s)
- Jing Chen
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, NHC Key Laboratory of Control of Tropical Diseases, School of Tropical Medicine, Hainan Medical University, Haikou, China
| | - Songlin Zhou
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, NHC Key Laboratory of Control of Tropical Diseases, School of Tropical Medicine, Hainan Medical University, Haikou, China
| | - Xian Zhang
- Schools of Basic Medicine and Life Sciences, Hainan Medical University, Haikou, China
| | - Huange Zhao
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, NHC Key Laboratory of Control of Tropical Diseases, School of Tropical Medicine, Hainan Medical University, Haikou, China
- *Correspondence: Huange Zhao,
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4
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Kang B, Oe T, Shimizu Y, Takikawa H. Syntheses of three 8-methoxyisoflavans from newly developed 7-benzyloxy-3-chloro-8-methoxy-2H-chromene as the precursor. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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5
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Shi S, Li J, Zhao X, Liu Q, Song SJ. A comprehensive review: Biological activity, modification and synthetic methodologies of prenylated flavonoids. PHYTOCHEMISTRY 2021; 191:112895. [PMID: 34403885 DOI: 10.1016/j.phytochem.2021.112895] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/18/2021] [Accepted: 07/31/2021] [Indexed: 06/13/2023]
Abstract
Prenylated flavonoids, a unique class of flavonoids which combine a flavonoid skeleton and a lipophilic prenyl side-chain, possess great potential biological activities including cytotoxicity, anti-inflammation, anti-Alzheimer, anti-microbial, anti-oxidant, anti-diabetes, estrogenic, vasorelaxant and enzyme inhibition. Recently, prenylated flavonoids have become an indispensable anchor for the development of new therapeutic agents, and have received increasing from medicinal chemists. The prenylated flavonoids have been outstanding developed through isolation, semi or fully synthesis in a very short period of time, which proves the great value in medicinal chemistry researches. In this review, research progress of prenylated flavonoids including natural prenylated flavonoids, structural modification, synthetic methodologies and pharmacological activities was summarized comprehensively. Furthermore, the structure-activity relationships (SARs) of prenylated flavonoids were summarized which provided a basis for the selective design and optimization of multifunctional prenylated flavonoid derivatives for the treatment of multi-factorial diseases in clinic.
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Affiliation(s)
- Shaochun Shi
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jichong Li
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Xuemei Zhao
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Qingbo Liu
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China; Jilin Yizheng Pharmaceutical Group Co., Ltd., Jilin Province, Siping, 136001, China.
| | - Shao-Jiang Song
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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6
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Abstract
The present review describes 108 new examples of naturally occurring flavans and
flavanones having cytotoxic potential, which have been reported during the period of 2005 to
mid-2020. These compounds are found either as aglycones or as glycosides, comprising
flavans, flavanones, isoflavanones and miscellaneous flavanones (homo- and bi-flavanones).
The main topics addressed in this review are source, structure, and cytotoxic activity in detail
and the structure-activity relationship.
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Affiliation(s)
- Arindam Gangopadhyay
- Department of Chemistry, Rampurhat College, Rampurhat, Birbhum, West Bengal, India
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7
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Kaennakam S, Sukandar ER, Hongnak S, Rassamee K, Siripong P, Tip-Pyang S. Velucarpin D, a new pterocarpan from the stems of Dalbergia velutina and its cytotoxicity. Nat Prod Res 2020; 35:3925-3930. [PMID: 32249600 DOI: 10.1080/14786419.2020.1749613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
A new pterocarpan, named velucarpin D (1), along with nine known pterocarpans (2-10) were isolated from the stems of Dalbergia velutina. Their structures were determined by spectroscopic analysis. All isolated compounds were evaluated for their cytotoxicity against five human cancer cell lines (KB, HeLa S-3, MCF-7, Hep G2, and HT-29). Compound 2 showed potent cytotoxicity against all the five human cancer cell lines with IC50 values in the range of 4.74-8.46 µM. In addition, compounds 1, 3, 4, 5 and 9 showed moderate cytotoxicity against both KB and HeLa S-3 cells with IC50 values in the range of 14.23-29.35 µM.
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Affiliation(s)
- Sutin Kaennakam
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.,Department of Agro-Industrial, Food, and Environmental Technology, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand
| | - Edwin Risky Sukandar
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Siriwat Hongnak
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Kitiya Rassamee
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok, Thailand
| | - Pongpun Siripong
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok, Thailand
| | - Santi Tip-Pyang
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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8
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Posri P, Suthiwong J, Thongsri Y, Yenjai C. Antifungal activity of compounds from the stems of Dalbergia stipulacea against Pythium insidiosum. Nat Prod Res 2019; 35:2823-2830. [DOI: 10.1080/14786419.2019.1672068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Priyapan Posri
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Jittra Suthiwong
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Yordhathai Thongsri
- Cellular and Molecular Immunology Research Unit (CMIRU), Department of Medical Technology, Faculty of Allied Health Science, Naresuan University, Phitsanulok, Thailand
| | - Chavi Yenjai
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
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9
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Peng F, Zhu H, Meng CW, Ren YR, Dai O, Xiong L. New Isoflavanes from Spatholobus suberectus and Their Cytotoxicity against Human Breast Cancer Cell Lines. Molecules 2019; 24:molecules24183218. [PMID: 31487934 PMCID: PMC6766798 DOI: 10.3390/molecules24183218] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 08/30/2019] [Accepted: 09/04/2019] [Indexed: 12/30/2022] Open
Abstract
The rattans of Spatholobus suberectus Dunn are a traditional Chinese medicine activating blood circulation and removing stasis. They have often been used for the traditional Chinese medicinal treatment of breast cancer in modern China. In this study, four novel isoflavanes (1–3 and 5) and four known analogues (4 and 6–8) were isolated from an ethanolic extract of the rattans of S. suberectus. Their structures were elucidated by extensive spectroscopic analyses and electronic circular dichroism studies. MCF-7 and MDA-MB-231 human breast cancer cell lines were used to evaluate the cytotoxic effects of the isolates. Interestingly, compounds 1 and 2 only inhibited the proliferation of MCF-7 cells, while compound 6 showed a selective cytotoxicity against MDA-MB-231 cells. However, compound 4 had significant cytotoxicity against both MCF-7 and MDA-MB-231 cell lines.
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Affiliation(s)
- Fu Peng
- West China School of Pharmacy, Sichuan University, Chengdu 610041, China.
| | - Huan Zhu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
- Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Chun-Wang Meng
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
- Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Yan-Rui Ren
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Ou Dai
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
- Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Liang Xiong
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
- Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
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10
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Kaennakam S, Sukandar ER, Siripong P, Rassamee K, Tip-Pyang S. Veluflavanones A-P, Cytotoxic Geranylated Flavanones from Dalbergia velutina Stems. JOURNAL OF NATURAL PRODUCTS 2019; 82:276-282. [PMID: 30719909 DOI: 10.1021/acs.jnatprod.8b00688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Sixteen new geranylated flavanones, named veluflavanones A-P (1-16), and a known analogue (17), were isolated from Dalbergia velutina. The chemical structures of 1-17, as well as their absolute configurations, were determined by spectroscopic analysis and experimental ECD data. All isolated compounds were tested for their cytotoxicity against five human cancer cell lines. Compound 9 showed cytotoxicity toward KB, HeLa S3, and MCF-7 cells with IC50 values of 9.9, 8.1, and 10.0 μM, respectively. In addition, compounds 10, 11, 14, and 16 exhibited selective cytotoxicity against HeLa S3 cells with IC50 values of 6.6-9.9 μM.
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Affiliation(s)
- Sutin Kaennakam
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science , Chulalongkorn University , Bangkok , Thailand , 10330
| | - Edwin Risky Sukandar
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science , Chulalongkorn University , Bangkok , Thailand , 10330
| | - Pongpun Siripong
- Natural Products Research Section , National Cancer Institute , Bangkok , Thailand , 10400
| | - Kitiya Rassamee
- Natural Products Research Section , National Cancer Institute , Bangkok , Thailand , 10400
| | - Santi Tip-Pyang
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science , Chulalongkorn University , Bangkok , Thailand , 10330
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11
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Al-Maharik N. Isolation of naturally occurring novel isoflavonoids: an update. Nat Prod Rep 2019; 36:1156-1195. [DOI: 10.1039/c8np00069g] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review covers the literature concerning the isolation and identification of new naturally occurring isoflavonoids from Leguminosae and non-Leguminous species between 2012–2017.
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Affiliation(s)
- Nawaf Al-Maharik
- Department of Forensic Sciences
- Al Istilal University
- Jericho
- Palestinian Authority
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12
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Kaennakam S, Aree T, Rassamee K, Siripong P, Tip-pyang S. A New Tocopherol Derivative and Cytotoxicity from the Leaves of Dalbergia velutina. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801301212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A new tocopherol derivative, named (+)-α-tocuspirone (1), along with eleven known compounds, including six tocopherol derivatives (2–7) and five triterpenes (8–12) were isolated from the leaves of Dalbergia velutina. Their structures were determined by spectroscopic analysis especially NMR spectroscopy. The absolute configurations of 1 and 2 were assigned by NOESY experiments and ECD calculations. All isolated compounds were evaluated for their cytotoxicity against five cancer cell lines (KB, HeLa S-3, HT-29, MCF-7 and HepG-2). Dioslupecin A (10) showed potent cytotoxicity against all the five cancer cell lines with IC50 values in the range of 0.28–2.05 μM. In addition, caffeoxylupeol (12) showed potent cytotoxicity against KB cell with an IC50 value of 2.28 μM.
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Affiliation(s)
- Sutin Kaennakam
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Thammarat Aree
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kitiya Rassamee
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok 10400, Thailand
| | - Pongpun Siripong
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok 10400, Thailand
| | - Santi Tip-pyang
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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13
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Cuong NM, Nhan NT, Son NT, Nghi DH, Cuong TD. Daltonkins A and B, Two New Carboxyethylflavanones from the Heartwood ofDalbergia tonkinensis. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11313] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nguyen Manh Cuong
- Institute of Natural Products Chemistry; Vietnam Academy of Science and Technology (VAST); Hanoi 122100 Vietnam
- Graduate University of Science and Technology; Vietnam Academy of Science and Technology (VAST); Hanoi 122100 Vietnam
| | - Ngu Truong Nhan
- Graduate University of Science and Technology; Vietnam Academy of Science and Technology (VAST); Hanoi 122100 Vietnam
- Faculty of Science and Technology; Tay Nguyen University; Daklak 630000 Vietnam
| | - Ninh The Son
- Institute of Natural Products Chemistry; Vietnam Academy of Science and Technology (VAST); Hanoi 122100 Vietnam
| | - Do Huu Nghi
- Institute of Natural Products Chemistry; Vietnam Academy of Science and Technology (VAST); Hanoi 122100 Vietnam
- Graduate University of Science and Technology; Vietnam Academy of Science and Technology (VAST); Hanoi 122100 Vietnam
| | - To Dao Cuong
- Institute of Natural Products Chemistry; Vietnam Academy of Science and Technology (VAST); Hanoi 122100 Vietnam
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