Penicillins of the formula: ##STR1## wherein R is an unsubstituted phenyl group or a substituted phenyl group having one or more hydroxyl groups or a cyclohexadienyl group and A represents a monocyclic or polycyclic nitrogen-containing heterocyclic aromatic ring, which are useful as antimicrobial agents having a broad antimicrobial spectrum against gram-positive and gram-negative bacteria including Pseudomonas and can be produced advantageously from the phenacyl ester of 6-aminopenicillanic acid through a series of steps.
公式为:##STR1## 其中R为未取代的苯基或具有一个或多个羟基的取代苯基或环
己二烯基,A代表单环或多环含氮杂环芳香环,这些化合物是广谱抗菌剂,对革兰氏阳性和革兰氏阴性细菌包括假单胞菌具有广泛的抗菌谱,可以从
6-氨基青霉烷酸苯乙酰酯经一系列步骤优势地制备。