THE TITLE COMPOUND [SYSTEMATIC NAME: (1R,4aS,10aR,E)-N-benzyl-idene-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octa-hydro-phenanthren-1-amine], C(26)H(33)N, has been synthesized from nor-dehydro-abietylamine and benzaldehyde. The two cyclo-hexane rings form a trans ring junction with classic chair and half-chair conformations, respectively, the two methyl groups are on the same side of tricyclic hydro-phenanthrene structure. The dihedral angle between two benzene rings is 44.2 (4)°. The C=N bond is in an E configuration.