... 1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3- ... dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acid;LEVOFLUOROCARBOXYLIC ACID;S(-)-9,10-DIFL-2,3-DIHYDRO- ... (1,2,3-DE)-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;S-(-)-9,10-DIFLUORO-2,3-DIHYDRO-3- ... 8.molmp >300 °C(lit.)storage temp. Refrigerator CAS DataBase Reference 100986-89-8(CAS DataBase Reference) Levofloxacin carboxylic acid