Molecules of the title compound, C23H30N2O4, are located on a crystallographic mirror plane. The molecule has a curved shape with the dihedral angle formed between the two benzene rings being 55.26 (5)°. Intramolecular O—H⋯N hydrogen bonds are noted. In the crystal, supramolecular layers are formed in the ac plane owing to the presence of C—H⋯π interactions