2,4-Dioxo-1,2-dihydro-4H-3,1-benzoxazine 4H-3,1-Benzoxazin-2,4-(1H)-dion 4H-3,1-Benzoxazin-2,4(1H)-dion Anthranilic acid, N-carboxy-, cyclic anhydride Benzoic acid, 2-(carboxyamino)-, cyclic anhydride Benzoicacid,2-(carboxyamino)-,cyclicanhydride Isato acid anhydride 1,2-dihydro-4h-3,1-benzoxazine-2,4-dione