In the title compound, C(17)H(13)N(3)O(2), the pyrazine ring is oriented at 1.65 (11) and 88.33 (17)° with respect to the benzene rings. The benzene rings are nearly perpendicular to each other [dihedral angle 87.14 (17)°]. In the crystal, a weak C-H⋯N hydrogen bond occurs.