Abstract: Six compounds were isolated and identified from dried roots of Cucurbita foetidissima Hbk,by means of UV,IR,1H and 13C NMR,MS,and chemical methods.They are cucurbitacin B(I),Bryonolic acid(II),22-dihydrospinasterol,24α-ethyl-5α-cholesta-7-en－3β-ol(IIIa),24a－ethyl－5a－cholesta－7，trans－22－dien－3β-ol(IIIb),22－dihydrospinasterol，24a－ethyl－5a－cholesta－7－en－3－O－β-D－glucoside(Ⅳa),24a－ethyl－5a－cholesta－7,trans－22－dien－3－O－β-D－glucoside(Ⅳb).

Key words: Cucurbifa foetidissima

摘要： 臭瓜（Cucurbita foetidissima Hbk）根的石油醚、乙酸乙酯提取物，分离鉴定了六个化合物，葫芦素B（cucurbitacin B）I、拜俄尼酸（bryonolic acid）II、22氯化△7(8)菠甾醇（22－dihydro－spinasterol，24a－ethyl－5a－cholesta－7－en－3β-ol）IIIa、菠甾醇（24a－ethyl－5a－cholesta－7，trans－22－dien－3β-ol)IIIb、22氢化△7(8)菠甾醇葡萄糖甙(22－dihydrospinasterol，24a－ethyl－5a－cholesta－7－en－3－O－β-D－glucoside）Ⅳa、菠甾醇葡萄糖甙（24a－ethyl－5a－cholesta－7,trans－22－dien－3－O－β-D－glucoside) Ⅳb.

关键词: 臭瓜, 葫芦素B, 拜俄尼酸, 菠甾醇, 菠笛醇葡萄糖甙