2,2-Dimethyl-5-{[(4-nitro­phen­yl)amino]­methyl­idene}-1,3-dioxane-4,6-dione

In the title compound, C(13)H(12)N(2)O(6), the dihedral angle between the benzene ring and the amino­methyl­ene unit is 5.42 (16)°, while the angle between the amino­methyl­ene unit and the dioxane ring is 3.06 (43)°. The dioxane ring shows a half-boat conformation, in which the C atom between the dioxane ring O atoms is 0.464 (10) Å out of the plane. An intra­molecular N—H⋯O hydrogen bond stabilizes the mol­ecular conformation. In the crystal, a three-dimensional framework is built up via inter­molecular N—H⋯O hydrogen bonds.