Methyl 2-amino-4-(3-nitrophenyl)-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carboxylate dimethylformamide solvate

The title compound, C20H15N3O6·C3H7NO, was synthesized by the reaction of methyl 2-cyano-3-(3-nitro­phenyl)­acryl­ate and 4-hydroxy­quinolin-2-one in ethanol, catalysed by KF–alumina. X-ray analysis reveals that the pyran ring adopts a boat conformation.