1,4-Dihydro-1-ethyl-6-fluoro-7-(3-methyl-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid HCl 3-Quinolinecarboxylic acid, 1,4-dihydro-1-ethyl-6-fluoro-7-(3-methyl-1-piperazinyl)-4-oxo-, monohydrochloride 98079-48-2