Abstract
In the title compound, C(34)H(28)N(2)O(2)S, the piperidine ring adopts a chair conformation. One of the pyrrolidine rings adopts an envelope conformation with the methyl-ene C atom at the flap whereas the other pyrrolidine ring and the thia-zolidine ring adopt half-chair conformations. The mean plane of the dihydro-acenaphthyl-ene ring system [maximum deviation = 0.067 (1) Å] makes dihedral angles of 28.31 (5) and 31.32 (6)° with the two terminal benzene rings. An intra-molecular O-H⋯N hydrogen bond forms an S(5) ring motif. In the crystal, mol-ecules are linked by C-H⋯O and C-H⋯S hydrogen bonds into layers lying parallel to the ac plane.