Cardenolide diglycosides from Oxystelma esculentum

Two new cardenolide diglycosides, named oxystelmoside and oxystelmine, were isolated from the dried roots of Oxystelma esculentum. On the basis of chemical and spectroscopic evidence their structures were established as uzarigenin 3-O-beta-D-xylopyranosyl(1 --> 4)-O-beta-D-digitalopyranoside and periplogenin-3-O-6-deoxy-beta-D-glucopyranosyl(1 --> 4)-O-digitalopyranoside.