申请人:Banyu Pharmaceutical Co., Ltd.
公开号:US05100888A1
公开(公告)日:1992-03-31
A compound represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group; R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom or a lower alkyl group; and R.sup.4 represents a carboxyl group, a lower alkoxycarbonyl group, a carbamoyl group, a lower alkylcarbamoyl group, a di-lower alkylcarbamoyl group, or a carbonyl group substituted with a heterocyclic group selected from the group consisting of an aziridinyl group, an azetidinyl group, a pyrrolidinyl group, a piperidino group, a morpholino group, a thio-morpholino group, a piperazinyl group, and a 4-lower alkyl-1-piperazinyl group, or a pharmaceutically acceptable salt or ester thereof. The compound of formula (I) and their salts or esters exhibit excellent antibacterial activity.
化合物的化学式(I)如下:##STR1##其中R.sup.1代表氢原子或甲基基团;R.sup.2和R.sup.3,可以相同也可以不同,每个代表氢原子或较低的烷基基团;R.sup.4代表羧基、较低的烷氧羰基、氨基、较低的烷基氨基、二个较低的烷基氨基、或者羰基上取代了异环丙基、环氮丙基、吡咯啉基、哌啶基、吗啉基、硫代吗啉基、哌嗪基和4-较低烷基-1-哌嗪基组成的杂环基团,或者其药学上可接受的盐或酯。化合物的化学式(I)及其盐或酯表现出优异的抗菌活性。