Descurainia sophia seeds were defatted with petroleum ether and then their glucosinolates were extracted with boiling water.

• 用石油醚对播娘蒿种子脱脂,热水提取,并采用DEAE sephadex A-25层析预处理,除去杂质,得到播娘蒿种子的硫苷提取液。