5H-Thiazolo(3,2-a)quinoline-4-carboxylic acid, 7-fluoro-8-(4-methyl-1-piperazinyl)-5-oxo-

7-Fluoro-8-(4-methylpiperazin-1-yl)-5-oxo-5H-[1,3]thiazolo[3,2-a]quinoline-4-carboxylic acid