Chemical constituents from stems of Lonicera japonica
Zhang, C.; Yin, Z.; Ye, W.; Guan, Y.; Guo, L.; Zhang, J.; Shen, W.
Zhongguo Zhong Yao Za Zhi 34(23): 3051-3053
2009
ISSN/ISBN: 1001-5302 PMID: 20222422 Document Number: 634004
To investigate the chemical constituents from the ethanol extract of the stems of Lonicera japonica. The constituents were isolated and purified by repeated column chromatography on silica gel, Sephadex LH-20 and MCI HP-20. Their structures were identified by phsicochemical properties and spectroscopic analysis. Thirteen compounds were isolated and identified as protocatechuic acid (1), caffeic acid (2), macranthoin G (3), esculetin (4), luteolin (5), quercetin (6), apigenin (7), luteolin-7-O-beta-D-glucopyranoside (8), isorhamnetin-7-O-beta-D-glucopyranoside (9), diosmetin-7-O-beta-D-glucopyranoside (10), rhoifolin (11), lonicerin (12), hydnocarpin D (13). Compound 4, 7, 9-11 were isolated from this plant for the first time, while compound 13 was first reported flavanolignan from this genus Lonicera.