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

8-chloro-7-fluoro-1,2-dimethyl-5-oxo-5H-thiazolo<3,2-a>quinoline-4-carboxylic acid

ethyl 8-chloro-7-fluoro-1,2-dimethyl-5-oxo-5H-thiazolo<3,2-a>quinoline-4-carboxylate

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