Two new oleanolic acid saponins named asteryunnanoside F and G were isolated from the roots. of Aster yunnenensis. The chemical structures were determined as oleanolic acid-28-O-βD-glucopyranosyl-(1→6)-β-D-glucO an...Two new oleanolic acid saponins named asteryunnanoside F and G were isolated from the roots. of Aster yunnenensis. The chemical structures were determined as oleanolic acid-28-O-βD-glucopyranosyl-(1→6)-β-D-glucO and 3-O-β-Dglucopyranosyl-oleanolic acid-28-O-βD-glucopyranosyl-(1→6)[-rhamn by speCtral data,especially 2D NMR anajysis (COSY, HETCOR, HOHAHA and ROESY), and Chemical transformations.展开更多
our new saponins were isolated from the leaves of Oplopanax elatus Nakai.The structures of the four saponins , tentatively named compounds A(1) , B(2) , C(3) and D (4) were elucidated to be 28-O-a-L-rhamnopyranosyl (1...our new saponins were isolated from the leaves of Oplopanax elatus Nakai.The structures of the four saponins , tentatively named compounds A(1) , B(2) , C(3) and D (4) were elucidated to be 28-O-a-L-rhamnopyranosyl (1-4)-β-D-glu-copyranosyl ( 1-6 )-β-D-glucopyranosyl esters of betulinic acid 3-O-β-D-glucopyra-noside (1) . oleanolic acid 3-O-β-D-glucopyranoside (2) , 3a, 23-dihydroxyolean-12-ene-28-Oic acid ( = 3-epi-hederagenin ) (3) , 3β-hydroxyolean-12-ene-23-al-28-oic acid (=gypsogenin) (4) , respetively.展开更多
文摘Two new oleanolic acid saponins named asteryunnanoside F and G were isolated from the roots. of Aster yunnenensis. The chemical structures were determined as oleanolic acid-28-O-βD-glucopyranosyl-(1→6)-β-D-glucO and 3-O-β-Dglucopyranosyl-oleanolic acid-28-O-βD-glucopyranosyl-(1→6)[-rhamn by speCtral data,especially 2D NMR anajysis (COSY, HETCOR, HOHAHA and ROESY), and Chemical transformations.
文摘our new saponins were isolated from the leaves of Oplopanax elatus Nakai.The structures of the four saponins , tentatively named compounds A(1) , B(2) , C(3) and D (4) were elucidated to be 28-O-a-L-rhamnopyranosyl (1-4)-β-D-glu-copyranosyl ( 1-6 )-β-D-glucopyranosyl esters of betulinic acid 3-O-β-D-glucopyra-noside (1) . oleanolic acid 3-O-β-D-glucopyranoside (2) , 3a, 23-dihydroxyolean-12-ene-28-Oic acid ( = 3-epi-hederagenin ) (3) , 3β-hydroxyolean-12-ene-23-al-28-oic acid (=gypsogenin) (4) , respetively.
