The raw material was extracted by petroleum and ethyl acetate successively.Ethyl acetate part was basified, and the soluble part was acidified.

• 将蜂胶原料分别用石油醚,乙酸乙酯浸泡,对乙酸乙酯浸泡部分碱化,分液,酸化,再分别用氯仿,乙酸乙酯,正丁醇分配萃取。