常见例句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为原料合成了苄青霉素低毒前体苯乙酰基乙醇胺。 返回 benzylpenicillin