Abstract
Fifteen new stilbenoids including 11 phenylbenzofurans, the stemofurans A-K (1-11), and four dihydrostilbenes, the stilbostemins A (15), C (17), E (19), and F (20), were isolated and identified from a methanolic extract of Stemona collinsae roots together with five known derivatives, the stilbenes pinosylvin (13) and 4'-methylpinosylvin (14), the dihydrostilbenes, stilbostemins B (16) and D (18), and the dihydrophenanthrene racemosol (12) as well as (+)-sesamin, coniferyl alcohol, and stigmasterol. Bioautographic tests with Cladosporium herbarum displayed antifungal activity for stilbenoids of all four structural types. Ten derivatives were tested against five microfungi using the microdilution technique linked with digital image analysis of germ tubes.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Alternaria / drug effects
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Antifungal Agents / chemistry
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Antifungal Agents / isolation & purification*
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Antifungal Agents / pharmacology
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Benzofurans / chemistry
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Benzofurans / isolation & purification*
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Benzofurans / pharmacology
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Botrytis / drug effects
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Chromatography, High Pressure Liquid
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Chromatography, Thin Layer
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Cladosporium / drug effects
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Furans / chemistry
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Furans / isolation & purification*
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Furans / pharmacology
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Fusarium / drug effects
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Magnetic Resonance Spectroscopy
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Molecular Structure
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Plant Roots / chemistry
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Plants, Medicinal / chemistry*
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Stilbenes / chemistry
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Stilbenes / isolation & purification*
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Stilbenes / pharmacology
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Thailand
Substances
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Antifungal Agents
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Benzofurans
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Furans
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Stilbenes