ethyl 7-chloro-1-cyclopropyl-6-nitro-4-oxoquinoline-3-carboxylate

1-(4-Fluoro-phenyl)-7-(4-methyl-piperazin-1-yl)-6-nitro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

7-(3-Acetylamino-pyrrolidin-1-yl)-6-amino-1-cyclopropyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

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

1-Cyclopropyl-7-(3-methyl-piperazin-1-yl)-6-nitro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester