The crystal structure of the title compound, C(16)H(24)N(2)O, is built up from two fused six- and five-membered rings linked to C(9)H(19) chains. The fused-ring system is essentially planar, the largest deviation from the mean plane being 0.009 (2) Å. The chain is nearly perpendicular to this plane [dihedral angle = 80.27 (17)°]. In the crystal, inter-molecular N-H⋯O hydrogen bonds form dimers with an R(2) (2)(8) graph-set motif. These dimers are further connected through C-H⋯O hydrogen bonds, building sheets parallel to (100).