108405-58-9 1H,5H-Benzo(ij)quinolizine-2-carboxylic acid, 9-fluoro-6,7-dihydro-5-methyl-8-(4-methyl-1-piperazinyl)-1,7-dioxo-, monohydrochloride 9-Fluoro-6,7-dihydro-5-methyl-8-(4-methyl-1-piperazinyl)-1,7-dioxo-1H,5H-benzo(ij)quinolizine-2-carboxylic acid QA 241 QA-241