[Chemical constituents from Elsholtzia blanda].

Hai-yong Chen, Chang-xin Zhou, Yi-jia Lou, Zhi-hong Duan, Yu Zhao

Index: Zhongguo Zhong Yao Za Zhi 30(20) , 1589-91, (2005)

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Abstract

To investigate the constituents of Elsholtzia blanda.The chemical components were isolated by polyamide and silica gel column chromatography. Their structures were identified with extensive spectral (EI-MS, ESI-MS, 1H-NMR, 13C-NMR, DEPT, 1H-1H-COSY, HMBC, HMQC) and chemical methods.Five compounds were isolated and identified as luteolin (I), luteolin-5-O-beta-D-glucopyranoside (II), luteolin-7-O-beta-D-glucopyranoside (III), 5-hydroxy-7, 8 -dimethoxyflavone (IV) and 5-hydroxy-6, 7-dimethoxyflavone (V).Compounds III, IV, V were isolated from E. blanda for the first time and I was firstly separated from the genus Elsholtzia.