PITHEDULOSIDES A-G, OLEANANE GLYCOSIDES FROM PITHECELLOBIUM DULCE

Seven saponins named pithedulosides A-G were isolated from the seeds o f Pithecellobium dulce. Their structures were established through spec tral analyses as echinocystic acid L-arabinopyranosyl-(1-->6)-beta-D-g lucopyranoside, echinocystic acid and oleanolic acid L-arabinopyranosy l-(1-->2)-alpha-arabinopyranosyl- (1-->6)-beta-D-glucopyranosides and -D-xylopyranosyl-(1-->2)-alpha-L-arabinopyranosyl- (1-->6)-beta-D-gluc opyranosides, oleanolic acid L-arabinopyranosy-(1-->2-alpha-L-arabinop yranosyl- -D-glucopyranosyl-(1-->2)]-beta-D-glucopyranoside, and -D-xy lopyranosyl-(1-->2)-alpha-L-arabinopyranosyl- (1-->6)-[beta-D-glucopyr anosyl-(1-->2)]-beta-D- glucopyranoside. Copyright (C) 1997 Elsevier S cience Ltd.