Grepafloxacin (unspecified)

1-cyclopropyl-6-fluoro-5-methyl-7-(3-methylpiperazin-1-yl)-4-oxo-quino line-3-carboxylic acid

1-Cyclopropyl-6-fluoro-5-methyl-7-(3-methyl-1-piperazinyl)-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid

1-Cyclopropyl-6-fluoro-1,4-dihydro-5-methyl-4-oxo-7-(3-methyl-1-piperazinyl)quinoline-3-carboxylic acid