Abstract
Three new biflavonoids to which we have accorded the trivial names calycopterone (1), isocalycopterone (2), and 4-demethylcalycopterone (3) and the known flavone 4',5-dihydroxy-3,3',6,7-tetramethoxyflavone (4) were isolated as cytotoxic constituents from the flowers of Calycopteris floribunda Lamk. (Combretaceae). Compounds 1-3 showed a wide range of activity against a panel of solid tumor cell lines. Among the biflavonoids, calycopterone (1) is the major constituent.
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Animals
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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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Benzopyrans / pharmacology
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Drug Screening Assays, Antitumor
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Flavonoids / chemistry
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Flavonoids / isolation & purification
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Flavonoids / pharmacology*
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Humans
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Mice
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Models, Molecular
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Molecular Conformation
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Tumor Cells, Cultured
Substances
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Antineoplastic Agents, Phytogenic
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Benzopyrans
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Flavonoids
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calycopterone