2H-1-Benzopyran-4-carboxamide, N,N-diethyl-2-oxo- Coumarin-4-carboxylic acid diethylamide DJ2253500 N,N-Diethyl-2-oxo-2H-1-benzopyran-4-carboxamide N,N-Diethyl-4-coumarincarboxamide