英文别名ethyl 7-chloro-6-fluoro-4-oxo-1,4-dihydroquinoline 3-carboxylate; ethyl 7-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate; 7-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid ethyl ester; ethyl 7-chloro-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylate; ethyl 7-chloro-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylate; 7-Chloro-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester; 7-chloro-3-ethoxycarbonyl-6-fluoro-4-oxo-1,4-dihydro-quinoline; Norfloxacin Impurity 4; 3-Quinolinecarboxylic acid, 7-chloro-6-fluoro-1,4-dihydro-4-oxo-, ethyl ester; Norfloxacin Impurity 9; Amifloxacin Impurity 3 
