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Flavanol Derivatives from Rhizophora stylosa and Their DPPH Radical Scavenging Activity

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Author(s): Dong-Li Li | Xiao-Ming Li | Ze-Yu Peng | Bin-Gui Wang

Journal: Molecules
ISSN 1420-3049

Volume: 12;
Issue: 5;
Start page: 1163;
Date: 2007;
Original page

Keywords: Rhizophoraceae | Rhizophora stylosa | flavanol | radical scavenging activity

ABSTRACT
A new acetylated flavanol, 3,7-O-diacetyl (–)-epicatechin (3), and seven known flavanol derivatives, (–)-epicatechin (1), 3-O-acetyl (–)-epicatechin (2), 3,3′,4′,5,7-O-pentaacetyl (–)-epicatechin (4), (+)-afzelechin (5), (+)-catechin (6), cinchonain Ib (7), and proanthocyanidin B2 (8), were isolated from the stems and twigs of the mangrove plant Rhizophora stylosa and identified. The crude extract, the different fractions and all of the purified compounds were evaluated for DPPH radical scavenging activity.
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