Flavanol Derivatives from Rhizophora stylosa and Their DPPH Radical Scavenging Activity

doi:10.3390/12051163

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Molecules 2007, 12(5), 1163-1169; doi:10.3390/12051163

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Flavanol Derivatives from Rhizophora stylosa and Their DPPH Radical Scavenging Activity

Dong-Li Li¹, Xiao-Ming Li¹, Ze-Yu Peng¹ and Bin-Gui Wang^1,*

¹ Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao, 266071, P.R. China ² Graduate School of Chinese Academy of Sciences, Beijing, 100049, P.R. China

* Author to whom correspondence should be addressed.

Received: 18 May 2007; in revised form: 15 May 2007 / Accepted: 16 May 2007 / Published: 26 May 2007

(This article belongs to the Special Issue Phenolics and Polyphenolics)

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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.

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

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Cite This Article

MDPI and ACS Style

Li, D.-L.; Li, X.-M.; Peng, Z.-Y.; Wang, B.-G. Flavanol Derivatives from Rhizophora stylosa and Their DPPH Radical Scavenging Activity. Molecules 2007, 12, 1163-1169.

AMA Style

Li D.-L., Li X.-M., Peng Z.-Y., Wang B.-G. Flavanol Derivatives from Rhizophora stylosa and Their DPPH Radical Scavenging Activity. Molecules. 2007; 12(5):1163-1169.

Chicago/Turabian Style

Li, Dong-Li; Li, Xiao-Ming; Peng, Ze-Yu; Wang, Bin-Gui. 2007. "Flavanol Derivatives from Rhizophora stylosa and Their DPPH Radical Scavenging Activity." Molecules 12, no. 5: 1163-1169.

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