2,6-Dimethyl-3,7-diphenyl-2,6-naphthyridine-1,5(2H,6H)-dione

The title compound, C₂₂H₁₈N₂O₂, has a center of symmetry, and the parameters of half of each of the two independent molecules have been determined. The naphthyridine ring is planar; the coplanarity of the naphthyridine ring and the phenyl rings is hindered by the N-methyl groups. The dihedral angles between the rings are 51.8 (2) and 61.5 (2)° in the two independent molecules.

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