7-[4-(Ethoxycarbonyl)piperazin-1-yl]-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

3-Quinolinecarboxylic acid,7-[4-(ethoxycarbonyl)-1-piperazinyl]-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-