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Chen HW, Jiang CX, Ma GL, Wu XY, Jiang W, Li J, Zang Y, Li J, Xiong J, Hu JF. Unprecedented spirodioxynaphthalenes from the endophytic fungus Phyllosticta ligustricola HDF-L-2 derived from the endangered conifer Pseudotsuga gaussenii. PHYTOCHEMISTRY 2023; 211:113687. [PMID: 37105348 DOI: 10.1016/j.phytochem.2023.113687] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 04/17/2023] [Accepted: 04/20/2023] [Indexed: 05/27/2023]
Abstract
Four undescribed palmarumycin-type spirodioxynaphthalenes (phyligustricins A-D) and a known biogenetic precursor (palmarumycin BG1) were isolated from a solid fermentation of Phyllosticta ligustricola HDF-L-2, an endophyte associated with the endangered Chinese conifer Pseudotsuga gaussenii. The structures were elucidated by spectroscopic methods, single-crystal X-ray diffraction analyses, and electronic circular dichroism calculations. Both phyligustricins A and B have an unprecedented spirodioxynaphthalene-derived skeleton containing an extra 4H-furo [3,2-c]pyran-4-one moiety, while phyligustricins C and D are p-hydroxy-phenethyl substituted spirodioxynaphthalenes. The plausible biosynthetic relationships of the isolates were briefly proposed. Phyligustricins C and D and palmarumycin BG1 showed considerable antibacterial activity against Staphylococcus aureus, each with an MIC value of 16 μg/mL. Palmarumycin BG1 displayed significant inhibitory effects against ACL and ACC1, with IC50 values of 1.60 and 8.00 μM, respectively.
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Affiliation(s)
- Hao-Wei Chen
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Chun-Xiao Jiang
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China; School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, PR China
| | - Guang-Lei Ma
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Xi-Ying Wu
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Wei Jiang
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Jiyang Li
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Yi Zang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, PR China
| | - Jia Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, PR China
| | - Juan Xiong
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China.
| | - Jin-Feng Hu
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China; School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, PR China.
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Zask A, Ellestad GA. Reflections on the intriguing occurrence of some recently isolated natural products as racemates and scalemic mixtures. Chirality 2021; 33:915-930. [PMID: 34633708 DOI: 10.1002/chir.23360] [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: 04/20/2021] [Revised: 08/24/2021] [Accepted: 08/26/2021] [Indexed: 12/12/2022]
Abstract
This review continues our interest in the intriguing reports of a variety of new racemic natural products (at least 11 in the past 4 years). These include the polyphenolic racemate galewone, the polycyclic prenylated acylphloroglucinol garcinielliptone; variecolortide, a combination of an anthraquinone and a isochinulin-type alkaloid; the isoindoline alkaloid irpexine, the new hybrid phenylproanoid asarone; colletopyandione an indolydenepyradione; the enantiomerically enriched (scalemic) neolignans, gardenifolins; and meroterpenoid pabmaragramin in addition to some marine lipids. We also present a recent biomimetic synthesis of the polyketide preuisolactone A; synthesis of the polyketide spiromamakone A, which also corrected the proposed structure of another metabolite as identical to spiromamakone A; and the melicolones A and B. The continuing reports of natural racemates provoke speculation as to their role in the producing organism.
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Affiliation(s)
- Arie Zask
- Department of Biological Sciences, Columbia University, New York, NY, USA
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Liu X, Li S, Wei X, Zhao Y, Lai D, Zhou L, Wang M. Total synthesis of Palmarumycin BGs, C 1 and Guignardin E. RSC Adv 2020; 10:1588-1594. [PMID: 35494718 PMCID: PMC9047396 DOI: 10.1039/c9ra10316c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 12/19/2019] [Indexed: 11/21/2022] Open
Abstract
The first total synthesis of Palmarumycin BG1–3, BG5–6, C1 and Guignardin E (1–7) were achieved by the same intermediate Palmarumycin C2 through a N-benzyl cinchoninium chloride-catalyzed epoxidation, an organoselenium-mediated reduction, and a cerium(iii) chloride hydrate-promoted regioselective ring-opening and elimination of cyclic α,β-epoxy ketone as the key steps via6–7 step routes using 1,8-dihydroxynaphthalene (DHN) and 5-methoxytetralone as the starting materials in overall yields of 1.0–17.4%, respectively. Their structures and absolute configurations were characterized and determined by 1H, 13C NMR, IR, HR-ESI-MS and X-ray diffraction data. These compounds displayed significant inhibition activities against HCT116, U87-MG, HepG2, BGC823 and PC9 cell lines. The first total syntheses of Palmarumycin BG1–3, BG5–6, C1 and Guignardin E were achieved. These compounds displayed significant inhibition activities against HCT116, U87-MG, HepG2, BGC823 and PC9 cell lines.![]()
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Affiliation(s)
- Xinlei Liu
- Department of Applied Chemistry, College of Sciences, China Agricultural University Beijing 100193 People's Republic of China
| | - Shuyi Li
- Department of Applied Chemistry, College of Sciences, China Agricultural University Beijing 100193 People's Republic of China
| | - Xinyu Wei
- Department of Applied Chemistry, College of Sciences, China Agricultural University Beijing 100193 People's Republic of China
| | - Yu Zhao
- Department of Applied Chemistry, College of Sciences, China Agricultural University Beijing 100193 People's Republic of China
| | - Daowan Lai
- Department of Plant Pathology, College of Plant Protection, China Agricultural University Beijing 100193 People's Republic of China
| | - Ligang Zhou
- Department of Plant Pathology, College of Plant Protection, China Agricultural University Beijing 100193 People's Republic of China
| | - Mingan Wang
- Department of Applied Chemistry, College of Sciences, China Agricultural University Beijing 100193 People's Republic of China
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Phukhamsakda C, Macabeo APG, Huch V, Cheng T, Hyde KD, Stadler M. Sparticolins A-G, Biologically Active Oxidized Spirodioxynaphthalene Derivatives from the Ascomycete Sparticola junci. JOURNAL OF NATURAL PRODUCTS 2019; 82:2878-2885. [PMID: 31599583 DOI: 10.1021/acs.jnatprod.9b00604] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
To explore the chemical diversity of metabolites from new species of Dothideomycetes, the ex-type strain of Sparticola junci was investigated. Seven highly oxygenated and functionalized spirodioxynaphthalene natural products incorporating carboxyalkylidene-cyclopentanoid (1-4), carboxyl-functionalized oxabicyclo[3.3.0]octane (5-6), and annelated 2-cyclopentenone/δ-lactone (7) units, sparticolins A-G, were isolated from submerged cultures of the fungus. Their chemical structures including their relative (and absolute) configurations were established through spectroscopic and X-ray crystallographic analyses. Sparticolin B (2) exhibited inhibitory activity against the Gram-positive bacteria Bacillus subtilis, Micrococcus luteus, and Staphylococcus aureus, while sparticolin G (7) showed antifungal activities against Schizosaccharomyces pombe and Mucor hiemalis. All other sparticolins were only weakly active against S. aureus and also showed weak activities against the nematode Caenorhabditis elegans. Compounds 2 and 7 also showed moderate cytotoxic activities against seven mammalian cell lines.
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Affiliation(s)
- Chayanard Phukhamsakda
- Center of Excellence in Fungal Research , Mae Fah Luang University , Chiang Rai 57100 , Thailand
| | - Allan Patrick G Macabeo
- Department of Microbial Drugs , Helmholtz Centre for Infection Research and German Centre for Infection Research (DZIF) , partner site Hannover/Braunschweig, Inhoffenstrasse 7 , 38124 Braunschweig , Germany
- Laboratory for Organic Reactivity, Discovery and Synthesis (LORDS), Research Center for the Natural and Applied Sciences , University of Santo Tomas , 1015 Manila , Philippines
| | - Volker Huch
- Institut für Anorganische Chemie , Universität des Saarlandes , Campus, Gebäude C 4.1, 66123 Saarbrücken , Germany
| | - Tian Cheng
- Department of Microbial Drugs , Helmholtz Centre for Infection Research and German Centre for Infection Research (DZIF) , partner site Hannover/Braunschweig, Inhoffenstrasse 7 , 38124 Braunschweig , Germany
| | - Kevin D Hyde
- Center of Excellence in Fungal Research , Mae Fah Luang University , Chiang Rai 57100 , Thailand
| | - Marc Stadler
- Department of Microbial Drugs , Helmholtz Centre for Infection Research and German Centre for Infection Research (DZIF) , partner site Hannover/Braunschweig, Inhoffenstrasse 7 , 38124 Braunschweig , Germany
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Doi T, Tsukamoto H, Nomura Y. First Total Synthesis of Palmarumycin C6 based on Double Oxa-Michael Addition of 1,8-Dihydroxynaphthalene to 3-Bromo-1-indenone. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)52] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Gui Q, Wang J, Ng S, Dancevic A, Wright TB, Evans PA. Copper-catalyzed desymmetrization of prochiral 4,4-disubstituted cyclopentenes via a site-selective allylic oxidation: a concise total synthesis of untenone A. Chem Commun (Camb) 2019; 55:12368-12371. [DOI: 10.1039/c9cc01743g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The desymmetrization of prochiral 4,4-disubstituted cyclopentenes via a site-selective copper-catalyzed allylic oxidation is described.
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Affiliation(s)
- Qingwen Gui
- Department of Chemistry
- Queen's University
- Kingston
- Canada
- College of Science
| | - JuanJuan Wang
- Department of Chemistry
- Queen's University
- Kingston
- Canada
- College of Chemistry and Chemical Engineering
| | - Sean Ng
- Department of Chemistry
- University of Liverpool
- Liverpool
- UK
| | - Anja Dancevic
- Department of Chemistry
- University of Liverpool
- Liverpool
- UK
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Liu X, Wang W, Zhao Y, Lai D, Zhou L, Liu Z, Wang M. Total Synthesis and Structure Revision of Palmarumycin B 6. JOURNAL OF NATURAL PRODUCTS 2018; 81:1803-1809. [PMID: 30102534 DOI: 10.1021/acs.jnatprod.8b00258] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Palmarumycin B6 and its regioisomer were synthesized via 7- and 13-step routes using 2-chlorophenol and 4-chlorophenyl methyl ether as the starting materials in overall yields of 2.7% and 12%, respectively. Their structures were characterized by 1H and 13C NMR, HRESIMS, and X-ray diffraction data. The structure of palmarumycin B6 was revised as 6-chloropalmarumycin CP17. The bioassay results showed that the larvicidal activity of palmarumycin B6 with an LC50 value of 32.7 μM was significantly higher than that of its 8-chloro isomer, with an LC50 value of 227.3 μM.
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Tsukamoto H, Hanada S, Nomura Y, Doi T. Total Synthesis of Spiromamakone A and Structure Revision of Spiropreussione A. J Org Chem 2018; 83:9430-9441. [DOI: 10.1021/acs.joc.8b01075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hirokazu Tsukamoto
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Shogo Hanada
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Yumi Nomura
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Takayuki Doi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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Tsukamoto H, Nomura Y, Fujiwara K, Hanada S, Doi T. Conjugate Addition to Acylketene Acetals Derived from 1,8-Dihydroxynaphthalene and Its Application To Synthesize the Proposed Structure of Spiropreussione A. Org Lett 2018; 20:3140-3143. [PMID: 29737863 DOI: 10.1021/acs.orglett.8b01259] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A conjugate addition of diverse nucleophiles to acylketene acetals derived from 1,8-dihydroxynaphthalene (DHN) is developed for the formation of its 3-oxoalkan-1-one acetals. The initial acylketene acetals are prepared via double oxa-Michael addition of DHN to 1-bromo-1-propyn-3-ones. Carbonucleophiles, including organocopper reagents and active methylene compounds, and heteroatom nucleophiles were introduced under basic conditions. This method is applied for synthesizing spiropreussione A; the proposed structure does not correspond to that of the authentic natural product.
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Affiliation(s)
- Hirokazu Tsukamoto
- Graduate School of Pharmaceutical Sciences , Tohoku University , 6-3 Aza-aoba , Aramaki, Aoba-ku , Sendai 980-8578 , Japan
| | - Yumi Nomura
- Graduate School of Pharmaceutical Sciences , Tohoku University , 6-3 Aza-aoba , Aramaki, Aoba-ku , Sendai 980-8578 , Japan
| | - Koichi Fujiwara
- Graduate School of Pharmaceutical Sciences , Tohoku University , 6-3 Aza-aoba , Aramaki, Aoba-ku , Sendai 980-8578 , Japan
| | - Shogo Hanada
- Graduate School of Pharmaceutical Sciences , Tohoku University , 6-3 Aza-aoba , Aramaki, Aoba-ku , Sendai 980-8578 , Japan
| | - Takayuki Doi
- Graduate School of Pharmaceutical Sciences , Tohoku University , 6-3 Aza-aoba , Aramaki, Aoba-ku , Sendai 980-8578 , Japan
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Abstract
Exploration of structurally novel natural products greatly facilitates the discovery of biologically active pharmacophores that are biologically validated starting points for the development of new drugs. Endophytes that colonize the internal tissues of plant species, have been proven to produce a large number of structurally diverse secondary metabolites. These molecules exhibit remarkable biological activities, including antimicrobial, anticancer, anti-inflammatory and antiviral properties, to name but a few. This review surveys the structurally diverse natural products with new carbon skeletons, unusual ring systems, or rare structural moieties that have been isolated from endophytes between 1996 and 2016. It covers their structures and bioactivities. Biosynthesis and/or total syntheses of some important compounds are also highlighted. Some novel secondary metabolites with marked biological activities might deserve more attention from chemists and biologists in further studies.
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Affiliation(s)
- Han Gao
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao 266021, China.
| | - Gang Li
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao 266021, China.
| | - Hong-Xiang Lou
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao 266021, China.
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China.
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Tsukamoto H, Hanada S, Kumasaka K, Kagaya N, Izumikawa M, Shin-ya K, Doi T. Synthesis of Spiromamakone A Benzo Analogues via Double Oxa-Michael Addition of 1,8-Dihydroxynaphthalene. Org Lett 2016; 18:4848-4851. [DOI: 10.1021/acs.orglett.6b02328] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hirokazu Tsukamoto
- Graduate
School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Shogo Hanada
- Graduate
School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Koichi Kumasaka
- Graduate
School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Noritaka Kagaya
- National Institute of Advanced Industrial Science and Technology (AIST), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Miho Izumikawa
- Japan Biological Informatics Consortium (JBIC), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Kazuo Shin-ya
- National Institute of Advanced Industrial Science and Technology (AIST), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Takayuki Doi
- Graduate
School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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Fuse S, Inaba K, Takagi M, Tanaka M, Hirokawa T, Johmoto K, Uekusa H, Shin-ya K, Takahashi T, Doi T. Design and synthesis of 2-phenyl-1,4-dioxa-spiro[4.5]deca-6,9-dien-8-ones as potential anticancer agents starting from cytotoxic spiromamakone A. Eur J Med Chem 2013; 66:180-4. [DOI: 10.1016/j.ejmech.2013.05.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 05/21/2013] [Accepted: 05/23/2013] [Indexed: 10/26/2022]
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Cai YS, Guo YW, Krohn K. Structure, bioactivities, biosynthetic relationships and chemical synthesis of the spirodioxynaphthalenes. Nat Prod Rep 2010; 27:1840-70. [PMID: 21038061 DOI: 10.1039/c0np00031k] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- You-Sheng Cai
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zu Chong Zhi Rd. 555, Shanghai, 201203, People's Republic of China
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Chen X, Shi Q, Lin G, Guo S, Yang J. Spirobisnaphthalene analogues from the endophytic fungus Preussia sp. JOURNAL OF NATURAL PRODUCTS 2009; 72:1712-1715. [PMID: 19708679 DOI: 10.1021/np900302w] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A study on the chemical constituents of the endophytic fungus Preussia sp. led to the isolation of three new spirobisnaphthalene analogues, spiropreussione A (1), spiropreussione B (2), and spiropreussomerin A (3). Compound 2 is a spirobisnaphthalene analogue with a cyclopenteno-naphthoindene fragment bridged to a 1,8-dioxygenated naphthalene fragment, and compound 1 is the second compound in this series with a spiro-nonadiene skeleton. The structures of 1-3 were elucidated using spectroscopic data interpretation. Compound 1 showed cytotoxicity toward A2780 and BEL-7404 cells with IC(50) values of 2.4 and 3.0 microM, respectively, and weak activity against Staphylococcus aureus (CMCC B26003) with a MIC value of 25 microM.
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Affiliation(s)
- Xiaomei Chen
- Biotechnology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
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