7H-Pyrido[3,2,1-ij][4,1,2]benzoxadiazine-6-carboxylic acid, 9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-

7H-Pyrido[3,2,1-ij][4,1,2]benzoxadiazine-6-carboxylic acid, 9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-