Abstract
A new cyclohexenone (1) and a new caffeoyl ester derivative (2), together with the known compounds (-)-isolariciresinol 3-alpha-O-beta-D-glucopyranoside (3), (+)-1-hydroxypinoresinol 1-O-beta-D-glucopyranoside (4), isoacteoside (5), luteolin 4'-O-beta-D-glucopyranoside (6), and indole-3-carboxylic acid (7), were isolated from the leaves of Bauhinia tarapotensis. The structures of these new compounds were determined by spectroscopic data analysis. The antioxidant activities of 1-7 were determined by measuring their free radical scavenging effects, using the 1,1-diphenyl-2-dipicrylhydrazyl free radical (DPPH) and Trolox equivalent antioxidant activity (TEAC) methods, and the coupled oxidation of beta-carotene and linoleic acid. Compounds 3-5 showed good activities in the DPPH and TEAC tests, while compounds 1 and 2 were active in the coupled oxidation of beta-carotene and linoleic acid bioassay.
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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Benzothiazoles
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Bepridil / analogs & derivatives*
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Bepridil / pharmacology
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Biphenyl Compounds
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Caffeic Acids / chemistry
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Caffeic Acids / isolation & purification*
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Caffeic Acids / pharmacology
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Chromans / pharmacology
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Chromatography, High Pressure Liquid
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Cyclohexanones / chemistry
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Cyclohexanones / isolation & purification*
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Cyclohexanones / pharmacology
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Ecuador
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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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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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Glucosides / chemistry
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Glucosides / isolation & purification*
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Glucosides / pharmacology
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Indoles / chemistry
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Indoles / isolation & purification
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Indoles / pharmacology
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Luteolin*
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Magnetic Resonance Spectroscopy
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Molecular Structure
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Phenols*
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Picrates*
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Plant Leaves / chemistry
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Plants, Medicinal / chemistry*
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Sulfonic Acids / chemistry
Substances
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1-hydroxypinoresinol 1-O-glucopyranoside
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Antioxidants
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Benzothiazoles
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Biphenyl Compounds
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Caffeic Acids
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Chromans
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Cyclohexanones
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Flavonoids
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Free Radical Scavengers
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Glucosides
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Indoles
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Phenols
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Picrates
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Sulfonic Acids
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cyclohexanone, caffeoyl ester
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isolariciresinol 3-O-glucopyranoside
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luteolin 4'-O-glucoside
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2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid
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isoacteoside
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indole-3-carboxylic acid
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cyclohexanone
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Bepridil
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1,1-diphenyl-2-picrylhydrazyl
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Luteolin
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6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid