Abstract
Two new flavanes, (2R)-4'-hydroxy-2',5,7-trimethoxyflavane (1) and (2R,4R)-2',4'-dihydroxy-5,7-dimethoxyflavan-4-ol (2), were isolated from Uraria clarkei, together with two known compounds 5,7-dimethoxy-4'-hydroxyflavan (3) and 5,7,4'-trimethoxyflavan (4). The structures of the new flavanes were characterized by analyses of the MS, IR, UV, CD, 1D, and 2D NMR data. Cytotoxicity test suggested that compounds 1-4 possessed slight activity against K-562 and Hela cell lines, with the IC50 values ranging from 26.6 to 56.3 μM.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Antineoplastic Agents, Phytogenic / chemistry
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Antineoplastic Agents, Phytogenic / isolation & purification*
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Antineoplastic Agents, Phytogenic / pharmacology
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Drug Screening Assays, Antitumor
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Fabaceae / chemistry*
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Flavonoids / chemistry
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Flavonoids / isolation & purification*
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Flavonoids / pharmacology
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HeLa Cells
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Humans
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Inhibitory Concentration 50
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K562 Cells
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
Substances
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(2R)-4'-hydroxy-2',5,7-trimethoxyflavane
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(2R,4R)-2',4'-dihydroxy-5,7-dimethoxyflavan-4-ol
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Antineoplastic Agents, Phytogenic
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Flavonoids