1-Benzyl-4′,5′-diphenyl­piperidine-3-spiro-3′-pyrrolidine-2′-spiro-3′′-indoline-4,2′′-dione

The asymmetric unit of the title compound, C(34)H(31)N(3)O(2), consists of two independent mol­ecules which differ slightly in the orientations of the phenyl rings with respect to the pyrrolidine ring. In both mol­ecules, the piperidin-4-one ring adopts a chair conformation, whereas the pyrrolidine ring adopts an envelope conformation in one of the mol­ecules and a twisted conformation in the other. An intra­molecular C—H⋯O hydrogen bond is observed. The crystal packing is stabilized by inter­molecular N—H⋯O hydrogen bonds and C—H⋯π inter­actions.