英文别名(3S)-10-(4-Ethyl-1-piperazinyl)-9-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid; Levofloxacin impurity 23; (2S)-6-(4-Ethylpiperazin-1-yl)-7-fluoro-2-methyl-10-oxo-4-oxa-1-azatricyclo[7.3.1.05,13]trideca-5(13),6,8,11-tetraene-11-carboxylic acid; (3S)-10-(4-Ethyl-1-piperazinyl)-9-fluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic Acid; Levofloxacin Impurity 27; (S)-10-(4-Ethylpiperazin-1-yl)-9-fluoro-3-methyl-7-oxo-3,7-dihydro-2H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid; (-)-(s)-9-fluoro-2,3-dihydro-3-methyl-10-(4-ethyl-1-piperazinyl)-7-oxo-7h-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid; 7H-Pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 10-(4-ethyl-1-piperazinyl)-9-fluoro-2,3-dihydro-3-methyl-7-oxo-, (3S)-; N-Ethyl Levofloxacin; Levofloacin Impurity R; Levofloxacin impurity R 
