Chemical constituents from Elsholtzia blanda / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the constituents of Elsholtzia blanda.</p><p><b>METHOD</b>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.</p><p><b>RESULT</b>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).</p><p><b>CONCLUSION</b>Compounds III, IV, V were isolated from E. blanda for the first time and I was firstly separated from the genus Elsholtzia.</p>