Antioxidant principles from Bauhinia tarapotensis

Citation
A. Braca et al., Antioxidant principles from Bauhinia tarapotensis, J NAT PROD, 64(7), 2001, pp. 892-895
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Agricultural Chemistry","Pharmacology & Toxicology
Journal title
JOURNAL OF NATURAL PRODUCTS
ISSN journal
0163-3864 → ACNP
Volume
64
Issue
7
Year of publication
2001
Pages
892 - 895
Database
ISI
SICI code
0163-3864(200107)64:7<892:APFBT>2.0.ZU;2-0
Abstract
A new cyclohexenone (1) and a new caffeoyl ester derivative (2), together w ith the known compounds (-)-isolariciresinol 3-alpha -O-beta -D-glucopyrano side (3), (+)-1-hydroxypinoresinol 1-O-beta -D-glucopyranoside (4), isoacte oside (5), luteolin 4'-O-beta -D-glucopyranoside (6), and indole-3-carboxyl ic acid (7), were isolated from the leaves of Bauhinia tarapotensis. The st ructures of these new compounds were determined by spectroscopic data analy sis. The antioxidant activities of 1-7 were determined by measuring their f ree radical scavenging effects, using the 1,1-diphenyl-2-dipicrylhydrazyl f ree radical (DPPH) and Trolox equivalent antioxidant activity (TEAC) method s, 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 a nd 2 were active in the coupled oxidation of beta -carotene and linoleic ac id bioassay.