Compounds of the formula ##STR1## wherein R.sup.1 is hydrogen, C.sub.1 -C.sub.6 alkyl, or a pharmaceutically acceptable cation; Y is cyclopropyl, ethyl or p-fluorophenyl, and X is hydrogen or fluoro, or X and Y taken together form a group ##STR2## wherein R.sup.3 is hydrogen or C.sub.1 -C.sub.4 alkyl; or a pharmaceutically acceptable salt thereof. Also disclosed are antibacterial pharmaceutical compositions comprising the foregoing compounds, methods of using the compounds in treating bacterial infections, and intermediates for the preparation of the compounds.
该公式化合物为 ##STR1## 其中R.sup.1是氢,C.sub.1 -C.sub.6烷基,或药用可接受的阳离子;Y是环丙基,乙基或对
氟苯基,X是氢或
氟,或X和Y一起形成一个基团 ##STR2## 其中R.sup.3是氢或C.sub.1 -C.sub.4烷基;或其药用可接受的盐。还披露了包括上述化合物的抗菌药物组合物,使用这些化合物治疗细菌感染的方法,以及制备这些化合物的中间体。