将四年生西洋参(Panax quinquefolium L.)茎叶粗粉45.5公斤,用氯仿提取去杂,再用甲醇提取。将甲醇提取液与用甲醇处理过的硅胶4.5公斤混合,过滤,硅胶用甲醇洗二次,将滤液,洗液合并并浓缩至约20升。甲醇提取物加二倍水稀释,用氯仿提取二次,水层 The four-year-old American ginseng (Panax quinquefolium L.) 45.5 kg of stems and leaves meal, extracted with chloroform to remove miscellaneous, methanol extraction. The methanol extract was mixed with 4.5 kg of silica treated with methanol, filtered, and the silica gel was washed twice with methanol. The filtrate and washings were combined and concentrated to about 20 liters. Methanol extract diluted with twice the water, extracted twice with chloroform, aqueous layer