ethyl 7-chloro-6-fluoro-1,4-dihydro-1-(formylmethylamino)-4-oxo-3-quinolinecarboxylate, 3-Quinolinecarboxylicacid,7-chloro-6-fluoro-1-(formylmethylamino)-1,4-dihydro-4-oxo-,ethyl ester, ethyl 1-(N-formyl-N-methyl)amino-6-fluoro-7-chloro-1,4-dihydro-4-oxoquinoline-3-carboxylate, 7-Chlor-6-fluor-1-(formylmethylamino)-1,4-dihydro-4-oxo-3-chinolincarbonsaeure-ethylester, ethyl 7-chloro-6-fluoro-1-(formylmethylamino)-1,4-dihydro-4-oxoquinoline-3-carboxylate,