Abstract
A new flavonol galloylrhamnoside, kaempferol 3-O-(2'',3''-di-O-galloyl)-alpha-L: -rhamnopyranoside, and a new lignan glycoside, hinokinin 7-O-beta-D: -glucopyranoside were isolated from the leaves of Koelreuteria henryi, along with 18 known compounds, including six flavonol glycosides (3-8), three lignans (9-11), four chlorophyll derivatives (12-15), two steroids (16, 17), and three aromatic compounds (18-20). The structures were determined on the basis of spectral analysis and chemical evidence. The scavenging effect of 1-8 and 20 on the stable free radical 1,1-diphenyl-2-picrylhydrazyl was examined. Compounds 1, 5, 6, and 20 showed more potent activity than that of trolox.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
MeSH terms
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Antioxidants / isolation & purification
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Antioxidants / pharmacology*
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Biphenyl Compounds
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Chromans / pharmacology
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Dioxoles / isolation & purification
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Dioxoles / pharmacology
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Flavonols / isolation & purification*
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Flavonols / pharmacology
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Free Radical Scavengers / isolation & purification
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Free Radical Scavengers / pharmacology*
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Glucosides / isolation & purification
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Glucosides / pharmacology
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Glycosides / isolation & purification
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Glycosides / pharmacology
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Kaempferols / isolation & purification
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Kaempferols / pharmacology
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Lignans / isolation & purification
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Lignans / pharmacology
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Medicine, Chinese Traditional
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Picrates
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Plant Leaves
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Proanthocyanidins / isolation & purification
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Proanthocyanidins / pharmacology
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Sapindaceae / chemistry*
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Spectrum Analysis
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Taiwan
Substances
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Antioxidants
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Biphenyl Compounds
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Chromans
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Dioxoles
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Flavonols
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Free Radical Scavengers
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Glucosides
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Glycosides
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Kaempferols
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Lignans
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Picrates
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Proanthocyanidins
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hinokinin 7-O-beta-D-glucopyranoside
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kaempferol 3-O-(2''3''di-O-galloyl)-alpha-L-rhamnopyranoside
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1,1-diphenyl-2-picrylhydrazyl
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6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid