Compounds of the formula
and pharmaceutically acceptable acid addition salts thereof, wherein
R¹ is hydrogen, (C₁-C₆)alkyl, or a pharmaceutically acceptable cation;
R² is ethyl, fluoroethyl, p-fluorophenyl, p-hydroxyphenyl or cyclopropyl;
R³ is fluorine or hydrogen; and
R⁴ is
wherein n is 1 or 2 and R⁵ is hydrogen or (C₁-C₃)alkyl are disclosed. 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.
该公式化合物及其药用酸盐包括以下成分,其中R¹为氢、(C₁-C₆)烷基或药用阳离子;R²为乙基、
氟乙基、对
氟苯基、对羟基苯基或环丙基;R³为
氟或氢;R⁴为其中n为1或2,R⁵为氢或(C₁-C₃)烷基。还披露了包含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。