Novel 4-oxoquinoline-3-carboxylic acid compounds of the formula: ##STR1## wherein R.sup.2 is a heterocyclic group: ##STR2## in which R.sup.A is H, C.sub.1 -C.sub.6 alkyl or phenyl (C.sub.1 -C.sub.6) alkyl, R.sup.B is 2-oxo-1,3-dioxolenemethyl substituted by C.sub.1 -C.sub.6 alkyl, or C.sub.3 -C.sub.8 cycloalkyl, R.sup.C is H, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxycarbonyl, or phenyl(C.sub.1 -C.sub.6)alkyl, R.sup.D is H or C.sub.1 -C.sub.6 alkyl, R.sup.G is C.sub.1 -C.sub.6 alkyl, and R.sup.H is C.sub.1 -C.sub.6 alkyl, phenyl(C.sub.1 -C.sub.6)alkyl, or C.sub.1 C.sub.6 alkanoyl, and R.sup.3 is C.sub.1 -C.sub.6 alkyl, or R.sup.3 is C.sub.1 -C.sub.6 alkyl having 1 to 3 substituents selected from OH, C.sub.1 -C.sub.6 alkoxy and halogen when R.sup.2 is ##STR3## or a salt thereof, said compounds having excellent antimicrobial activity and being useful as an antimicrobial agent, and a pharmaceutical composition containing said compound as an active ingredient.
4-
氧喹啉-3-羧酸衍
生物的
化学式:其中R.sup.2是一个杂环基团:在其中R.sup.A为H,C.sub.1 -C.sub.6烷基或
苯基(C.sub.1 -C.sub.6)烷基,R.sup.B是2-
氧代-1,3-二
氧杂
环戊烯甲基,被C.sub.1 -C.sub.6烷基或C.sub.3 -C.sub.8
环烷基取代,R.sup.C是H,C.sub.1 -C.sub.6烷基,C.sub.1 -C.sub.6烷
氧羰基,或
苯基(C.sub.1 -C.sub.6)烷基,R.sup.D是H或C.sub.1 -C.sub.6烷基,R.sup.G是C.sub.1 -C.sub.6烷基,R.sup.H是C.sub.1 -C.sub.6烷基,
苯基(C.sub.1 -C.sub.6)烷基,或C.sub.1 -C.sub.6酰基,R.sup.3是C.sub.1 -C.sub.6烷基,或R.sup.3是C.sub.1 -C.sub.6烷基,具有1至3个取代基,所选自OH,C.sub.1 -C.sub.6烷
氧基和卤素,当R.sup.2是##
STR3##或其盐,所述化合物具有出色的抗菌活性,可用作抗菌剂,并且含有所述化合物作为活性成分的药物组合物。