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。
2
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。
3
The ethyl acetate and n-butanol extraction were chromatographed on silica gel column, polyamide column, sephadex LH-20 column and preparing TLC, respectively.