Wegner & Bretschneider
Benzoheterocyclic compounds
 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. 
Otsuka Pharmaceutical Company, Ltd.
C C C C
C07D C07D C07D C07D
inventional inventional inventional inventional
Hiraki Hisashi Shinji Tatsuya
Ueda Miyamoto Aki Otsuka