2-(3-oxo-1,4-benzoxazin-4-yl)acetamide 2-(3-keto-1,4-benzoxazin-4-yl)acetamide 2-(3-oxo-1,4-benzoxazin-4-yl)ethanamide 26513-79-1 Paraxazone [INN] 2,3-Dihydro-3-oxo-4H-1,4-benzoxazine-4-acetamide. Paraxazone