... -7-OXO-2,3-DIHYDRO-7H-PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO ... -DIHYDRO-3-METHYL-7-OXO-7H-PYRIDO-[1,2,3-DE] [1,4]-BENZOXAZINE-6-CARBOXYLIC ACID;8,9-difluoro-3 ... -7-OXO-2,3-DIHYDRO-7H- PYRIDO (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO ... -DIHYDRO-3-METHYL-7-OXO-7H-PYRIDO-[1,2,3-DE][1,4]-BENZOXAZINE-6-CARBOXYLIC ACID;9,10-Difluoro-3 ...