摘要
Two new C27 steroidal glycosides, named taccaoside A (1) and B (2), were isolated from the traditional Chinese herb Tacca plantaginea. The spectroscopic and chemical evidences revealed their structures to be 26-O--D-glucopyranosyl-(25R)-3?26-dihydroxy furost-5,20-diene -3-O-[?L-rhamnopyranosyl(12)]-[?L-rhamnopyranosyl(13)]--D-glucopyranoside (1) and 26-O--D-glucopyranosyl-(25R)-3?26-dihydroxy furost-5,20-diene-3-O-[?L-rhamnopyranosyl- (12)]-[?D-glucopyranosyl(13)--L-rhamnopyranosyl(13)]--D-glucopyranoside (2), res- pectively.
Two new C27 steroidal glycosides, named taccaoside A (1) and B (2), were isolated from the traditional Chinese herb Tacca plantaginea. The spectroscopic and chemical evidences revealed their structures to be 26-O--D-glucopyranosyl-(25R)-3?26-dihydroxy furost-5,20-diene -3-O-[?L-rhamnopyranosyl(12)]-[?L-rhamnopyranosyl(13)]--D-glucopyranoside (1) and 26-O--D-glucopyranosyl-(25R)-3?26-dihydroxy furost-5,20-diene-3-O-[?L-rhamnopyranosyl- (12)]-[?D-glucopyranosyl(13)--L-rhamnopyranosyl(13)]--D-glucopyranoside (2), res- pectively.
