for the following products
1-(p-Fluoro-phenyl-6-fluoro-7-chloro-4-oxo-3-quinolinecarboxylic acid | 7-Chloro-6-fluoro-1-(4-fluorophenyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid and 7-Chloro-6-fluoro-1-(4'-fluoro phenyl)-1,4-dihydro-4-oxo-3-quinoline carboxylic acid
