(-)-9,10-DIFLUORO-3(S)-METHYL-7-OXO-2,3-DIHYDRO-7H-PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID; S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3-METHYL-7-OXO-7H-PYRIDO-[1,2,3-DE] [1,4]-BENZOXAZINE-6-CARBOXYLIC ACID; 8,9-difluoro-3-methyl-6-oxo-2,3-dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acid; LEVOFLUOROCARBOXYLIC ACID; S(-)-9,10-DIFL-2,3-DIHYDRO-3-ME-7H-PYRI&; (-)-9,10-DIFLUORO-3(S)-METHYL-7-OXO-2,3-DIHYDRO-7H- PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID; S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3-METHYL-7-OXO-7H-PYRIDO-[1,2,3-DE][1,4]-BENZOXAZINE-6-CARBOXYLIC ACID; 9,10-Difluoro-3(S)-methyl-7-oxo-2,3-dihyd;Levofloxacin carboxylic acid;(S)-(-)-9,10-Difluoro-2,3-dihydro-3-methyl-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, 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-, (3S)-; Levofloxacin q-acid; Levofloxacin q-acid, (-)-; Levofloxacin related compound B; Levofloxacin related compound B RS [USP]; Levofloxacin related compound B [USP]; UNII-08GT8FY84E;