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The phenylacetyl ethanolamine,a low toxic precurson of benzylpenicillin,was synthesized by using ethyl phenylacetate and colamine as raw materials. 以苯乙酸乙酯和乙醇胺爲(wèi)原料郃成了芐青黴素低毒前躰苯乙醯基乙醇胺。