1-Cyclopropyl-6-fluoro-7-(2-methyl-6-methylaminomethyl-pyridin-4-yl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

1-Cyclopropyl-7-(2-ethylaminomethyl-6-methyl-pyridin-4-yl)-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

1-Cyclopropyl-7-(2-dimethylaminomethyl-6-methyl-pyridin-4-yl)-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

7-(2,6-Dimethyl-pyridin-4-yl)-6-fluoro-1-(4-fluoro-phenyl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

1-tert-Butyl-7-(2,6-dimethyl-pyridin-4-yl)-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester