Ethyl 4-hy­droxy-2,6-diphenyl-1-[2-(piperidin-1-yl)acet­yl]-1,2,5,6-tetra­hydro­pyridine-3-carboxyl­ate

In the title compound, C27H32N2O4, the piperidine and tetra­hydro­pyridine rings adopt chair and half-chair conformations, respectively. The dihedral angle between the two phenyl rings is 32.9 (1)°. The mol­ecular structure is stabilized by a strong intra­molecular O—H⋯O hydrogen bond, generating an S(6) motif. In the crystal, inter­molecular C—H⋯O inter­actions form a ribbon-like structure along the a axis

Ethyl 1-benzoyl-4-hydroxy-2,6-diphenyl-1,2,5,6-tetrahydropyridine-3-carboxylate

In the title compound, C27H25NO4, the tetrahydropyridine ring adopts a half-chair conformation. The three phenyl rings form dihedral angles of 66.33 (7), 87.36 (8) and 36.90 (7)° with the least-squares plane through the tetrahydropyridine ring. The molecular conformation is stabilized by an intramolecular O—H...O hydrogen bond, generating an S(6) motif