Crystal structure of (E)-9-(4-nitro­benzyl­idene)-8,9-di­hydro­pyrido[2,3-d]pyrrolo­[1,2-a]pyrimidin-5(7H)-one

The title compound, C17H12N4O3, a pyrido­pyrrolo­pyrimidine derivative, is almost planar. The nitro­benzene ring is inclined to the mean plane of the 8,9-di­hydro­pyrido[2,3-d]pyrrolo­[1,2-a]pyrimidin-5(7H)-one moiety (r.m.s. deviation = 0.023 A) by 6.8 (1)°. In the crystal, mol­ecules are linked via C—H⋯O and C—H⋯N hydrogen bonds, forming layers parallel to (101).