6,8-Difluoro-1,4-dihydro-1-(MethylaMino)-7-(4-Methyl-1-piperazinyl)-4-oxo-3-quinolinecarboxylic Acid

6,7,8-Trifluoro-1,4-dihydro-1-(MethylaMino)-4-oxo-3-quinolinecarboxylic Acid