叉蕊薯芋(Dioscorea collettii Hook. f.)在我国分布较广,资源丰富。我们对该植物根茎中的甾体皂甙元等化学成分进行了系统分离。将四川野生叉蕊薯芋的根茎酸水解,水解物用石油醚提取,浓缩石油醚提取液得结晶。由此结晶中分离到薯芋皂甙元(diosgenin,l)和约莫皂甙元(yamo- Dioscorea collettii Hook. f. is widely distributed in our country and has abundant resources. We systematically isolated chemical components such as steroidal saponin from the roots of the plant. The crude rhizomes of Sichuan wild yam yam were acid hydrolyzed, the hydrolysates were extracted with petroleum ether, and the petroleum ether extract was concentrated to crystallize. Diosgenin (l) and approximately saponin (yamo-) were isolated from this crystal.