The compounds of the formula:
wherein R1 is amino or an organic residue bonded through nitrogen; R2 is carboxy or a group derivable therefrom; X is hydrogen, methoxy or formylamino, provided that when R' is acetylamino or amino and X is hydrogen, R2 is not paranitrobenzyloxycarbonyl or benzhydryloxycarbonyl or salts thereof exhibit excellent antimicrobial activity, and are utilized as antimicrobial agents.
式中的化合物:
其中 R1 是
氨基或通过氮键连接的有机残基;R2 是羧基或可由其衍生的基团;X 是氢、甲氧基或甲酰
氨基,条件是当 R' 是乙酰
氨基或
氨基且 X 是氢时,R2 不是对
硝基苯氧基羰基或苯甲酰氧基羰基或其盐,这些化合物具有优异的抗菌活性,可用作抗菌剂。