Three new 27-nor-triterpenoid saponins named rubenorside A (l), rubenorside B (2) and rubenorside C (9) were isolated from the roots of Adina rubella. Their structures were characterized as pyrocincholic acid 3β-O-α...Three new 27-nor-triterpenoid saponins named rubenorside A (l), rubenorside B (2) and rubenorside C (9) were isolated from the roots of Adina rubella. Their structures were characterized as pyrocincholic acid 3β-O-α-L-rhamnopyranosyl(28→ 1)-β-D-glucopyranosyl ester (1), pyrocincholic acid 3β-O-β-D-glucopyranosyl(1→2)-β-D-fucopyranosyl(28→1)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl ester (2) and pyrocincholic acid 3β-O-β-D-glucopyranosyl(1→2)-β-D-glucopyranosyl (28→ 1)-β-D-glucopyranosyl( 1→6)-β-D-glucopyranosyl ester (S) by spectral methods, especially 2D NMR experiments.展开更多
文摘Three new 27-nor-triterpenoid saponins named rubenorside A (l), rubenorside B (2) and rubenorside C (9) were isolated from the roots of Adina rubella. Their structures were characterized as pyrocincholic acid 3β-O-α-L-rhamnopyranosyl(28→ 1)-β-D-glucopyranosyl ester (1), pyrocincholic acid 3β-O-β-D-glucopyranosyl(1→2)-β-D-fucopyranosyl(28→1)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl ester (2) and pyrocincholic acid 3β-O-β-D-glucopyranosyl(1→2)-β-D-glucopyranosyl (28→ 1)-β-D-glucopyranosyl( 1→6)-β-D-glucopyranosyl ester (S) by spectral methods, especially 2D NMR experiments.
