In the title mol-ecule, C(17)H(18)N(4)O, the two phenyl rings form a dihedral angle of 18.15 (17)°. In the crystal, pairs of inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers. Weak inter-molecular C-H⋯O inter-actions further link the dimers into chains running along [010].