白英(Solanum lyratum Thunb)的茎系中药白毛芚,作解热镇痛药,近年来用于治疗肿瘤。本文从白英的茎分得甾体皂甙和甾体生物碱甙。提取和分离:取风干茎,用热水(60°)提取,提取液减压浓缩。提取物以乙酸乙酯于水浴上回流,除去可溶部分,不溶部分于丁醇-水(3:1)中分配。有机溶剂部分浓缩得残余物,上聚酰胺LH-20柱,甲醇洗脱,收集流分1-4。流分2行硅胶层析,氯仿-甲醇-水(7:3:0.2→ Solanum lyratum Thunb, a stem Chinese herbal medicine, is used as antipyretic and analgesic drugs and has been used to treat tumors in recent years. This article from the white stems were divided into steroidal saponins and steroidal alkaloid glycosides. Extraction and separation: Take the air-dried stems, extracted with hot water (60 °), the extract was concentrated under reduced pressure. The extract was refluxed on a water bath with ethyl acetate to remove the soluble fraction, which was partitioned between butanol-water (3: 1). The organic solvent was partially concentrated to a residue on a polyamide LH-20 column, eluting with methanol, fractions 1-4 were collected. The fractions were separated on silica gel column chromatography, chloroform-methanol-water (7: 3: 0.2 →