摘 要 ：从裂冠牛奶菜（Marsdenia incisa P. T.Li et Y．H．Li）的粗甙酸水解产物中分离得到 2个已知的C21甾体甙元-肉珊瑚甙元(sarcostin,I),青羊参甙元(qingyangshen- genin, II），和一个新的C21；甾体甙元，命名为裂冠牛奶菜甙元A（incisagenin-A, III)经光谱分析和化学反应，证明（Ⅲ)的结构为12- β-氧-顺芷酰去酰基萝摩甙元。
Abstract:From the acidic hydrolysate of crude glycoside of Marsdenia incisa P. T. Li et Y. H. Li, two known Cgi steroidal aglycones-sarcostin ( I ) , qingyangshengenin (I ), and a new C21 steroidal aglyconc named incisagenin-A (II) were isolated.