3-Quinolinecarboxylic acid, 1,4-dihydro-5-amino-1-cyclopropyl-6-fluoro-4-oxo-7-(1-piperazinyl)-

5-Amino-1-cyclopropyl-6-fluoro-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid