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DOI: 10.1055/s-0029-1185836
© Georg Thieme Verlag KG Stuttgart · New York
Antioxidative Phenylpropanoid-Substituted Epicatechin Glycosides from Parabarium huaitingii
Publikationsverlauf
received Dec. 24, 2008
revised May 7, 2009
accepted June 2, 2009
Publikationsdatum:
03. Juli 2009 (online)

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.
Key words
Parabarium huaitingii - Apocynaceae - phenylpropanoid‐substituted epicatechin glycosides - natural polyphenols - antioxidative activities
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Xin-sheng Yao
Institute of Traditional Chinese Medicine & Natural Products
Jinan University
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People's Republic of China
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