3-Quinolinecarboxylic acid, 6-fluoro-1-(4-fluorophenyl) 1,4-dihydro-7-(4-methyl-1-piperazinyl)-4-oxo-, monohydrochloride 6-Fluoro-1-(p-fluorophenyl)-1,4-dihydro-7-(4-methyl-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid monohydrochloride 91296-86-5 98106-17-3 Abbott 56619 DIFLOXACIN HYDROCHLORIDE Difloxacin hydrochloride [USAN]