The ethanol extract from the twig bark powder of Periploca sepium was suspended in water and successively treated with petroleum ether, ethyl acetate and n-butanol.
将杠柳枝皮粉末的乙醇提取物悬浮于水后，依次用石油醚、乙酸乙酯和正丁醇萃取。
Juemingzi extracts were prepared with ethyl acetate, n-butanol and water respectively.
以决明子为原料，分别用乙酸乙酯、正丁醇和水制备粗提取物。
Conclusion:Toxic components mainly exist in water-soluble part and n-butanol extract of Herba Siegesbeckiae.
结论：毒性成分主要存在于极性大的溶剂中，即残留的水溶性部分及正丁醇部分。
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