Synonyms: 7-Chloro-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylicacid ethyl ester;1,8-naphthyridine-3-carboxylic acid, 7-chloro-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-, ethyl ester;Ethyl 7-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate;Ethyl-7-chlor-1-cyclopropyl-6-fluor-4-oxo-1,4-dihydro-1,8-naphthyridin-3-carboxylate;