摘要
Two new oleanane-type triterpenoid saponins.sateryunn3noside A and B,were isolated from the roots of Aster yunnanensis Franch,and their Structures were elucidated based on spectral evidence and chemical hydrolysis. They have the same aglycone,Which has been assigned as 2a,3 .23-trihydroxyolean-12-en-28-cio acid,and the deference consisted only in 28-O-linked sugar moieties. Asteryunnanoside A is a 28-O-a-L-rhamnopyranosyl-(1-2)- -D-glucopyranoside and B is 28-O- -D-glucopyranosyl-(1 -2),-D-glucopyranoside of the corresponding aglycone.
Two new oleanane-type triterpenoid saponins.sateryunn3noside A and B,were isolated from the roots of Aster yunnanensis Franch,and their Structures were elucidated based on spectral evidence and chemical hydrolysis. They have the same aglycone,Which has been assigned as 2a,3 .23-trihydroxyolean-12-en-28-cio acid,and the deference consisted only in 28-O-linked sugar moieties. Asteryunnanoside A is a 28-O-a-L-rhamnopyranosyl-(1-2)- -D-glucopyranoside and B is 28-O- -D-glucopyranosyl-(1 -2),-D-glucopyranoside of the corresponding aglycone.
