Abstract
Analysis of a methanolic extract of Tagetes lucida leaves has resulted in the isolation of a new flavonol glycoside, quercetagenin 3,4'-dimethyl ether 7-O-beta-D-glucopyranoside (1), two new phenolic acids, 3-(2-O-beta-D-glucopyranosyl-4-methoxyphenyl)propanoic acid (2) and its methylester (3), and known flavonols, aromatic acids, and 7-methoxycoumarin. Using the DPPH degrees test, the extract and some of its constituents showed a significant free-radical-scavenging effect in comparison to alpha-tocopherol and standard flavonols.
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 / chemistry
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Antioxidants / isolation & purification*
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Antioxidants / pharmacology
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Biphenyl Compounds
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Chromatography, High Pressure Liquid
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Flavonoids / chemistry
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Flavonoids / isolation & purification*
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Flavonoids / pharmacology
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Free Radical Scavengers / chemistry
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Free Radical Scavengers / isolation & purification*
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Free Radical Scavengers / pharmacology
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Glycosides / chemistry
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Glycosides / isolation & purification*
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Glycosides / pharmacology
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Guatemala
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Picrates
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Plant Leaves / chemistry
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Plants, Medicinal / chemistry*
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Spectrophotometry, Ultraviolet
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Tagetes / chemistry*
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Tocopherols / pharmacology
Substances
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Antioxidants
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Biphenyl Compounds
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Flavonoids
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Free Radical Scavengers
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Glycosides
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Picrates
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quercetagenin 3,4'-dimethyl ether 7-O-glucopyranoside
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1,1-diphenyl-2-picrylhydrazyl
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Tocopherols