... -PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3-METHYL-7 ... -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- PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3-METHYL-7 ...