Details

Autor(en) / Beteiligte

• BRACA, Alessandra
• DE TOMMASI, Nunziatina
• DI BARI, Lorenzo
• PIZZA, Cosimo
• POLITI, Matteo
• MORELLI, Ivano

Titel

Antioxidant Principles from Bauhinia tarapotensis

Ist Teil von

• Journal of natural products (Washington, D.C.), 2001-07, Vol.64 (7), p.892-895

Ort / Verlag

Washington, DC: American Chemical Society

Erscheinungsjahr

2001

Quelle

MEDLINE

Beschreibungen/Notizen

• 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.