6-fluoro-1-methyl-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid;6-Fluoro-1,4-dihydro-1-methyl-4-Oxo-7-(1-piperazinyl)-3-quinolinecarboxylic Acid Hydrochloride(1:1); 6-Fluoro-1,4-dihydro-1-methyl-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic Acid Monohydrochloride; Norfloxacin Impurity K;N-Demethyl Norfloxacin Hydrochloride
