A New Triterpene Glycoside from Pinus pumila

摘要

In the current work, a novel triterpene saponin, named ursolic acid 3-O-[alpha-L-rhamnopyranosyl(1"-> 6')]-beta-D-glucopyranosyl-28-O-beta-D-glucuronopyranoside (1), together with two known flavonol glycosides, kaemferol 3-O-alpha-L-rhamnopyranoside (2) and quercetin 3-O-beta-D-glucopyranoside (3), was isolated from the stem outer barks of Pinus pumila by repeated column chromatography and vacuum liquid chromatography. The chemical structures of the secondary metabolites 1-3 were characterized by their spectroscopic data and other physico-chemical evidence, as well as by comparison with the literature. The secondary metabolites 2 and 3 were found in this species for the first time.