Wegner, Cantor, Mueller & Player
Benzoheterocyclic compounds
 Novel 3-formyl-4-oxoquinoline compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen atom or a lower alkanoyl, R.sup.2 is hydrogen atom or a lower alkyl, R.sup.3 is a lower alkyl, and X is halogen, and pharmaceutically acceptable salts 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, Limited
C A
C07D A61P
inventional inventional
Hiroshi Michiaki Hisashi Yoichi
Yamashita Tominaga Miyamoto Yabuuchi