苦绳的甾体成分

从苦绳(dregeasinensishemsl.)中分离到两个新化合物∶苦绳甙元乙(dresigeninb,1)和苦绳甙i(dresiosidei,2)。经光谱和化学反应确定其结构为∶20-o-(2-甲基丁酰基)托曼托甙元[20-o-(2-methylbutyryl)-tomentogenin]和二氢肉珊瑚甙元3-o-β-d-吡喃黄夹糖基(1-4)-β-d-吡喃夹竹桃糖基(1-4)-β-d-吡喃磁麻糖甙[dihydrosarcostin3-o-β-d-thevetopyranosyl(1-4)-β-d-oleandropyranosyl(1-4)-β-d-cymaropyranoside]。