Chemical Constituents from Polygonum capitatum

Abstract

Abstract:

Nine compounds were isolated from EtOAc extract of the Polygonum capitatum Buch.-Ham. ex D. Don.. Their structures were identified as quercetin 3-O-(4"-O-acetyl)-α-L-rhamnopyranoside (1)，quercetin (2)，quercitrin (3)，myricetrin (4)，quercetin 3-rhamnoside 2"-gallate (5)，protocatechuic acid (6)，daucosterol (7)，gallic acid (8) and progallin A (9) on the basis of their physical properties and the spectral data. Compound 1 was isolated from the genus Polygonum for the first time，and 4 was isolated from the plant for the first time. The NMR spectroscopic characteristics of the acetylated rhamnose of flavonoids glycosides were summarized.

Key words: Polygonum capitatum Buch.-Ham. ex D. Don, Polygonum, chemical constituents, flavonoids glycosides

ZHAO Huan-Xin, BAI Hong, LI Wei, WANG Yuan-Shu, LIU Yong-Jun, LIU Ai-Qin. Chemical Constituents from Polygonum capitatum[J]. NATURAL PRODUCT RESEARCH AND DEVELOPMENT, 2011, 23(2): 262-266.

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