1-tert-butyl-1,4-dihydro-7-(4-methyl-3-phenylpiperazin-1-yl)-6-nitro-4-oxoquinoline-3-carboxylic acid
1-tert-butyl-1,4-dihydro-7-(1-(4-methoxybenzyl)-3,4,5,6,7,8-hexahydroisoquinolin-2(1H)-yl)-6-nitro-4-oxoquinoline-3-carboxylic acid
1-t-butyl-7-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1-yl)-1,4-dihydro-6-nitro-4-oxoquinoline-3-carboxylic acid
1-tert-butyl-7-(4-(4-chlorophenyl)-4-hydroxypiperidin-1-yl)-1,4-dihydro-6-nitro-4-oxoquinoline-3-carboxylic acid
1-tert-butyl-7-(4-(3-(2,6-difluorophenyl)-5-methylisoxazol-4-ylcarbonyl)piperazin-1-yl)-1,4-dihydro-6-nitro-4-oxoquinoline-3-carboxylic acid