3-O-(O-alpha-L-rhamnopyranosyl-(1 --> 2)- O-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucopyranoside). The isolated saponins and their derivatives were examined for inhibitory activity on 12-O-tetradecanoylphorbol-13-acetate (TPA)-stimulated 32P-incorporation into phospholipids of HeLa cells as the primary screening test to find new antitumour-promoter compounds.
从长花百合的新鲜鳞茎中分离出两种新的螺
甾醇皂苷和两种新的呋
甾醇皂苷以及几种已知的
皂苷。新化合物的结构被确定为 (25S)-spirost-5-ene-3 beta, 27-diol 3-O-(O-alpha-L-rhamnopyranosyl-(1-->2)-O- [alpha -L-阿拉伯
吡喃糖基-(1-->3)]-β-
D-吡喃葡萄糖苷),(25R)-27-O-[(S)-3-羟基-3-甲基戊二酰基]-spirost-5-ene-3 β,27二醇3-O-(O-α-L-
吡喃
鼠李糖基-(1-->2)-O-[α-L-阿拉伯
吡喃糖基-(1-->3)]-β-
D-吡喃葡萄糖苷), 22-O-甲基-26-O-β-
D-吡喃葡萄糖基-(25R)-furost-5-ene-3 beta,22 xi, 26-triol 3-O-(O-alpha-L-rhamnopyranosyl-(1 -->2)-O-[α-L