There are two molecules in the asymmetric unit of the title compound, C23H33NO, in which the dihedral angles between the aromatic rings are 72.1 (3) and 89.0 (2)°. One of the molecules features a tert-butyl group disordered over two sets of sites in a 0.545 (13):0.455 (13) ratio. Both molecules feature an intramolecular O—H...N hydrogen bond, which closes an S(6) ring. Neither of the N—H groups participates in hydrogen bonds, perhaps due to steric crowding.
