A phosphine-catalysed addition of gramine to an alkyl-idene-amino-nitrile gives the title compound, C(25)H(24)N(4), in good yield. In the crystal, pairs of mol-ecules are connected via N-H⋯N hydrogen bonds into inversion dimers. The mol-ecules are characterized by a planar indole moiety [maximum deviation = 0.012 (1) Å], a chair conformation of the cyclo-hexane ring and an anti-periplanar conformation of the H atom on the cyclo-hexane and the adjacent cyano group.