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

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