申请人:Takeda Chemical Industries, Ltd.
公开号:US04897489A1
公开(公告)日:1990-01-30
The compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen, amino, isonitrile or an organic residue bonded through nitrogen; R.sup.2 is carboxy or a group derivable therefrom; X is hydrogen, methoxy, formylamino, alkyl which may be substituted, alkylthio in which the sulfur atom may be oxidized or azido, or forms a double bond together with the adjacent carbon atom; provided that when R.sup.1 is acetylamino or amino and X is hydrogen, R.sup.2 is not para-nitrobenzyloxycarbonyl or benzhydryloxycarbonyl, or a pharmaceutically acceptable salt thereof, exhibit excellent antimicrobial activity, and are utilized as antimicrobial agents.
该公式化合物为:##STR1## 其中R.sup.1为氢、氨基、异腈基或通过氮原子连接的有机残基;R.sup.2为羧基或可由其衍生的基团;X为氢、甲氧基、甲酰氨基、可能被取代的烷基、硫代烷基(其中硫原子可能被氧化)或叠氮基,或与相邻碳原子形成双键;但当R.sup.1为乙酰氨基基或氨基且X为氢时,R.sup.2不是对硝基苄氧羰基或苄基羟羰基,或其药用盐,表现出优异的抗微生物活性,并被用作抗微生物剂。