Five New Triterpene Glycosides from Wisteria branchybotrys (Leguminosae)

Abstract

From the vines of Wisteria brachybotrys (Leguminosae), five new oleanene glycosides, called wistariasaponins YC_{1, 2}, B₃ and A_{2, 3}, together with four known ones were isolated. Their structures have been elucidated to be 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranosyl-(1→2)-β-D-glucuronopyranosyl yunganogenin C 21-O-β-D-glucopyranoside (1), 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-galactopyranosyl-(1→2)-β-D-glucuronopyranosyl yunganogenin C 21-O-β-D-glucopyranoside (2), 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranosyl-(1→2)-β-D-glucuronopyranosyl wistariasapogenol B 30-O-β-D-glucopyranoside (3), 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranosyl-(1→2)-β-D-glucuronopyranosyl wistartiasapogenol A 30-O-β-D-glucopyranoside (4) and 3-O-β-galactopyranosyl-(1→2)-β-D-glucuronopyranosyl wistariasapogenol A 30-O-β-D-glucopyranoside (5), respectively.