Abstract: Two new sterodal saponins (Lieguonin-A and Leiguonin-B) iso-lated from root of Tacca plantaginea(Hance) Deenth were characterized as yamogenin-3-O-β-D-glucopyranosyl(1→2)[-α-L-rhamnopyranosyl (1→3)][-α-L-rhamnopyranosyl(1→4)][-β-Dglucopranoside and yamo-genin -3-O-α-L-rhamnopyranosyl(1→2)][-α-L-rhamnopyranosyl(1→3)][-β-D-glucopyranoside on basis of chemical and 1H NMR,13C NMr ,MS, IR spectral data.

Key words: Tacca plantaginea

摘要： 从裂果薯（Tacca plantaginea Drenth) 中分离到甲、乙、丙三个甾体化合物。化物合甲和乙，经光谱解析和化学分析鉴定为两个新甾体皂甙。其中裂果薯皂甙甲（Ⅱ）为一个糖连接方式上不常见的皂甙（约茂皂甙元一3－O一β-D-吡喃葡萄糖（1→2）[α－L一吡喃鼠李糖（1→3）〕［α－L-吡喃鼠李糖（1→4)]一β-D-吡喃葡萄糖甙）； 裂果薯皂甙乙（Ⅲ）（约茂皂甙元一3－O－α－L一吡喃鼠李糖（1—2）［α－L一吡喃鼠李糖（1→3)]一β-D一吡喃葡萄糖甙）。丙为豆甾醇甙。

关键词: 裂果薯, 裂果薯皂甙甲, 裂果薯皂甙乙