In the title compound, C(26)H(30)N(2)O(4)S, the thio-morpholine ring adopts a chair conformation whereas the tetra-hydro-pyridine ring is in a half-chair conformation. The dihedral angle between the two phenyl rings is 33.3 (2)°. A strong intra-molecular O-H⋯O hydrogen bond generates an S(6) motif. In the crystal, mol-ecules are linked by inter-molecular C-H⋯O hydrogen bonds, generating a ribbon-like structure propagating along the a axis.