In the title compound, C(28)H(37)NO(3), a crystallographic mirror plane bis-ects the mol-ecule (one half-mol-ecule in the asymmetric unit). The title compound exists in a twin-chair conformation with an equatorial orientation of the 4-but-oxy-phenyl groups. Both sides of the secondary amino group carry the 4-but-oxy-phenyl groups at an angle of 38.54 (3)° with respect to one another.