STUDIES ON LEGUMINOUS PLANTS .42. 5 NEW TRITERPENE GLYCOSIDES FROM RUSSELL LUPINE

In a continuing study on the ingredients of Lupinus genus, we examined the oligoglycoside constituents of the Russell lupine (L. polyphyllus x L. arboreus hybrid). Five new oleanene glycosides, called Lupinosid es PA(1-5)(1-5), together with three known ones were isolated. Their s tructures of 1-5 were determined to be galactopyranosyl-(1-->2)-beta-D -glucuronopyranosyl soyasapogenol A 21-O-beta-D-xylopyranoside (1), ga lactopyranosyl-(1-->2)-beta-D-glucuronopyranosyl soyasapogenol A 21-O- beta-D-xylopyranoside (2), galactopyranosyl-(1-->2)-beta-D-glucuronopy ranosyl kudzusapogenol A 21-O-beta-D-xylopyranoside (3), galactopyrano syl-(1-->2)-beta-D-glucuronopyranosyl soyasapogenol b 22-O-alpha-L-rha mnopyranoside (4), and galactopyranosyl-(1-->2)-beta-D-glucuronopyrano syl soyasapogenol B -D-glucopyranosyl-(1-->4)-alpha-L-rhamnopyranoside (5), respectively.