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将甘草根(1kg)粉碎后以乙醇提取19h,真空浓缩后的残渣(76.5g),以水和乙醚分配提取,水相再以乙醚提取,收集两次乙醚相,真空浓缩得54g残渣。残渣上硅胶柱,用逐渐增加乙酸乙酯含量的甲苯溶液洗脱。根据杀利什曼原虫的活性试验,对提取部分进行筛选,收集具有杀利什曼原虫的组分,真空浓缩后得1.83g残渣。残渣再上硅胶柱,用逐渐增加乙酸乙酯的二氯甲烷溶液洗脱。再以同样的筛选方法,收集具杀利什
The licorice root (1kg) was crushed and extracted with ethanol for 19h. The residue after vacuum concentration (76.5g) was partitioned and extracted with water and ether. The aqueous phase was extracted with diethyl ether. The ether phase was collected twice and concentrated under vacuum to obtain 54g of residue. The residue was applied to a silica gel column and eluted with gradually increasing ethyl acetate content in toluene. According to the Leishmania protozoa activity test, the extract fractions were screened, Leishmania protozoa-containing fractions were collected and concentrated in vacuo to give 1.83 g of residue. The residue was applied to a silica gel column and eluted with gradually increasing ethyl acetate in dichloromethane. Then with the same screening method, collect