... -7H-PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3-METHYL ... -2,3-dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acid;LEVOFLUOROCARBOXYLIC ACID;S(-)-9,10-DIFL-2,3-DIHYDRO ... -7H- PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3-METHYL ... -7H-PYRIDO-[1,2,3-DE][1,4]-BENZOXAZINE-6-CARBOXYLIC ACID;9,10-Difluoro-3(S)-methyl-7-oxo-2 ...