Synonyms: 9-CYANOMETHYL-8-FLUORO-3-METHYL-6-OXO-2,3-DIHYDRO-6H-1-OXA-3A-AZA-PHENALENE-5-CARBOXYLIC ACID;10-(CYANOMETHYL)-9-FLUORO-2,3-DIHYDRO-3-METHYL-7-OXO-7H-PYRIDO[1,2,3-DE]-1,4-BENZOXAZINE-6-CARBOXYLIC ACID;10-(Cyanomethyl)-9-fluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid