Antioxidative Phenylpropanoid-Substituted Epicatechin Glycosides from Parabarium huaitingii

 

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Abstract

Three new phenylpropanoid-substituted epicatechin glycosides, namely parabarosides A – C (1–3), together with three known compounds, 5-caffeoylquinic acid (4), 5-caffeoylshikimic acid (5), and 3,4-dicaffeoylquinic acid (6), were obtained from the plant Parabarium huaitingii. Their structures were determined and full assignments of ¹H- and ¹³C‐NMR spectroscopic data were achieved by analyses of 1D- and 2D‐NMR, mass, and CD spectra. The oxygen radical absorbance capacity (ORAC) assay was applied to evaluate their antioxidative capacity in vitro, which revealed that 1–6 showed strong antioxidative properties.

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Xin-sheng Yao

Institute of Traditional Chinese Medicine & Natural Products
Jinan University

Guangzhou 510632

People's Republic of China

Phone: + 86 20 85 22 58 49

Fax: + 86 20 85 22 58 49

Email: yaoxinsheng@vip.tom.com