Three new iridoid glucoside salts from Hedyotis tenelliflora Growing in Vietnam
Luu H Van Long1, Vo Thi Nga2, Nguyen Phuc Dam3
1Department of Chemistry, Thu Dau Mot University, 6 Tran Van On Street, Thu Dau Mot City, 820000 Binh Duong Province, Vietnam.
Abstract:
Three new sodium salts of iridoid acids, deacetylasperulosidic acid sodium salt (1), teneoside D (2), and teneoside E (3) were isolated from the leaves of Hedyotis tenelliflora Blume (Rubiaceae), together with seven known iridoids, 6alpha-hydroxygeniposide (4), 6beta-hydroxygeniposide (5), 6-O-methyldeacetylasperulosidic acid methyl ester (6), 6-O-methylscandoside methyl ester (7), 6alpha-methoxygeniposidic acid (8), daphylloside (9), and mollugoside methyl ester (10). Their chemical structures were elucidated by 1D and 2D NMR spectroscopy, as well as HR-ESI-MS analysis.
