Oleanane-Type Saponins From the Aerial Parts of Panax bipinnatifidus (Retracted Article)

Panax bipinnatifidus Seem. (Araliaceae), 1 of 11 kinds of ginseng (Panax spp.), has been used in traditional medicine but there are very few publications regarding its chemical constituents. This first study on phytochemical components in the aerial parts of the title ginseng led to the isolation of 7 oleanane-type saponins (1-7) including 1 new compound (1), together with hemsloside H1 (2), stipuleanoside R1 (3), stipuleanoside R2 (4), araloside A (5), and oleanolic acid 28-O-beta-D-glucopyranosyl ester (6), and 3-O-[beta-D-xy lopyranosyl(1 -> 2)-beta-D-glucuronopyranosyl]oleanolic acid 28-O-beta-D-glucopyranosyl ester (7), respectively. The structure of the new saponin was elucidated as 3-O-{beta-D-xylopyranosyl(1 -> 3)- [alpha-L-arabinofuranosyl(1 -> 4)]-beta-D-glucopyranosyl} oleanolic acid 28-O-beta-D-glucopyranosyl ester (1) on the basis of extensive evidence of chemical and spectroscopic experiments. The obtained results significantly contribute to the phytochemical database of P. bipinnatifidus associated with the chemotaxonomic meaning of P. bipinnatifidus and Panax spp.