5H-Thiazolo(3,2-a)quinoline-4-carboxylic acid, 7-fluoro-8-(4-methyl-1-piperazinyl)-5-oxo- 7-Fluoro-8-(4-methyl-1-piperazinyl)-5-oxo-5H-thiazolo(3,2-a)quinoline-4-carboxylic acid 84339-00-4