申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04220761A1
公开(公告)日:1980-09-02
##STR1## wherein R.sup.1 is amino or protected amino, R.sup.2 is an aliphatic hydrocarbon residue which may be substituted with hydroxy, protected hydroxy or lower alkylthio, R.sup.3 is a heterocyclic group substituted with amino(lower)alkyl, protected amino(lower)alkyl or hydroxy(lower)alkyl, and R.sup.4 is carboxy or functionally modified carboxy, "syn" or "anti" isomer.
其中R.sup.1是氨基或保护氨基,R.sup.2是脂肪烃基残基,可用羟基,保护羟基或低烷基硫代基取代,R.sup.3是杂环基,被氨基(较低)烷基,保护氨基(较低)烷基或羟基(较低)烷基取代,R.sup.4是羧基或功能修饰羧基,“syn”或“anti”异构体。