5H-Thiazolo(3,2-a)quinoline-4-carboxylic acid, 7-fluoro-1-methyl-5-oxo-8-(1-piperazinyl)-, hydrate (2:1) 7-Fluoro-1-methyl-5-oxo-8-(1-piperazinyl)-5H-thiazolo(3,2-a)quinoline-4-carboxylic acid 84339-08-2