申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04472300A1
公开(公告)日:1984-09-18
New antimicrobial azetidinone derivatives and their salt of the formula: ##STR1## wherein R.sub.1 amino or acylamino, and A is selected from a variety of groups.
新的抗微
生物的氮杂环
丙酮衍
生物及其盐,其
化学式为:##STR1## 其中R.sub.1为
氨基或酰胺基,A可从多种基团中选择。