In the title structure, C18H20N4, the aromatic rings are almost orthogonal [81.6 (2)°]. The mol­ecule has symmetry 2 since it is situated on a crystallographic twofold axis. There are only weak inter­molecular inter­actions present in the structure, notably C—H⋯π-electron ring inter­actions. The 1H and 13C NMR spectra are in accordance with the X-ray structure analysis.