Novel 4-oxoquinoline-3-carboxylic acid compounds of the formula: ##STR1## wherein R.sup.2 is a morpholino group which may be substituted by one to three C.sub.1 -C.sub.6 alkyl groups where each of the alkyl group may be substituted by 1 to 3 substituents selected from the group consisting of --NH.sub.2 and a halogen atom, and R.sup.3 is a C.sub.1 -C.sub.6 alkyl, --CH.sub.2 OH, ##STR2## (C.sub.1 -C.sub.6)alkylthiomethyl and --CH.sub.2 -halogen, or a pharmaceutically acceptable salt thereof, said compounds having excellent antimicrobial activity and hence being useful as an antimicrobial agent, and a pharmaceutical composition containing said compound as an active ingredient.
化合物的名称为Novel 4-oxoquinoline-3-carboxylic acid,其
化学式为:##STR1## 其中,R.sup.2是一个morpholino基团,可以被1至3个C.sub.1-C.sub.6烷基基团取代,其中每个烷基基团可以被1至3个取代基所取代,所述取代基选自--NH.sub.2和卤素原子,R.sup.3是一个C.sub.1-C.sub.6烷基,--CH.sub.2 OH,##STR2## (C.sub.1-C.sub.6)烷基
硫甲基和--CH.sub.2-卤素,或其药学上可接受的盐。这些化合物具有优异的抗微
生物活性,因此可用作抗微
生物剂,以及含有该化合物作为活性成分的制药组合物。