Abstract: From the rhizomes of Hemsleya amabilis,three sapionins of oleanolic acid were isolated,named hemslosides-Am1,-Mal and Ma3. Their structures have been elucidated as 3-O-α-arabinopyranosyl(1→3)- β-glucuronide of oleanolic acid，28-O-β-D-glucopyranosyl ester of oleanolic acid 3-O-α-arabinopyranosyl(1→3)- β-glucronide and 28-O-β-D-glucopyranosyl ester of oleanolic acid 3-O-［β-D-glucopyranosyl(1→2)］-［α-arabinopyranosyl(1→3)］- β-glucuroide respectively.In addition,cucurbitacins,cucurbitacin II gkycisude,oleanolic acid and β-sitosterol were obtained.

Key words: Hemsleya amabilis, Cucurbitiaceae, Hemslosides-Aml, and -Ma3, Cucurbitacins

摘要： 从圆果雪胆(Hemsleya amabilis)的块茎中分离到10个化合物，其中3个雪胆皂甙是首次从该种植物中得到，它们的结构通过光谱和化学的方法鉴定为齐墩果酸-3-O-α-吡喃阿拉伯糖(1→3)- β-葡萄糖醛酸甙，28-O-β-D-吡喃葡萄糖齐墩果酸3-O-α-吡喃阿拉伯糖(1→3)- β-D-葡萄糖醛酸，28-O-β-D-吡喃葡萄糖齐墩果酸3-O-［β-D-吡喃葡萄糖(1→2)］-［α-吡喃阿拉伯糖(1→3)］- β-D-葡萄糖醛酸。同时还得到雪胆甲素，雪胆乙素，雪胆乙素甙，齐墩果酸和β-谷甾醇等。

关键词: 圆果雪胆, 葫芦科, 雪胆皂甙, 雪胆素