Study on flavonoid chemical constituents contained in Memorialis hirta / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the chemical constituents of Memorialis hirta.</p><p><b>METHOD</b>Compounds were isolated and purified by multiple methods, and their structures were identified based on physicochemical property and spectrum data.</p><p><b>RESULT</b>12 compounds were isolated from ethyl acetate from 95% ethanol extracts of M. hirta, they were isorhamnetin (1), kaempferol (2), quercetin (3), isorhamnetin-3-O-alpha-L-rhamnopyranoside (4), kaempferol-3-O-alpha-L-rhamnopyranoside (5), isorhamnetin-3-O-beta-D-glucopyranoside (6), kaempferol-3-O-beta-D-glucopyranoside (7), quercetin-3-O-alpha-L-rhamnopyranoside (8), quercetin-3-O-beta-D-glucopyranoside (9), isorhamnetin-3-O-rutinoside (10), kaempferol-3-O-rutinoside (11) and quercetin-3-O-rutinoside (12), respectively.</p><p><b>CONCLUSION</b>All compounds were obtained from the genus Memorialis for the first time.</p>