26727-04-8 2H-1,4-Benzoxazine-2-carboxamide, 3,4-dihydro-N,N-diethyl-3-oxo- 3,4-Dihydro-N,N-diethyl-3-oxo-2H-1,4-benzoxazine-2-carboxamide N,N-Diethylcarbamoyl-2 oxo-3 dihydro-2,3 benzoxazine-1,4 [French]