A New Triterpene Glycoside from Pinus pumila.

In the current work, a novel triterpene saponin, named ursolic acid 3-O-[α-L-rhamnopyranosyl(1"→6')]-β-D-glucopyranosyl-28-O-β-D-glucuronopyranoside (1), together with two known flavonol glycosides, kaemferol 3-O-α-L-rhamnopyranoside (2) and quercetin 3-O-β-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. [ABSTRACT FROM AUTHOR]