6-Amino-1-methyl-4-oxo-7-[4-(3-trifluoromethyl-phenyl)-piperazin-1-yl]-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

6-Amino-7-[4-(1H-benzoimidazol-2-yl)-piperazin-1-yl]-1-methyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

1-Methyl-6-nitro-3-(4-pyridin-2-yl-piperazine-1-carbonyl)-7-(4-pyridin-2-yl-piperazin-1-yl)-1H-quinolin-4-one

ethyl 7-[4-(2H-1,4-benzothiazin-3-yl)-1-piperazinyl]-1-methyl-6-nitro-4-oxo-1,4-dihydroquinoline-3-carboxylate