4′-(4-Methylbenzoyl)-1′-methyldispiro[indole-3(2H),2′-pyrrolidine-3′,3′′(2′′H)-indole]-2,2′′-dione

In the title compound, C27H23N3O3, the central pyrrolidine ring adopts an envelope conformation. In the crystal structure, the mol­ecules exist as centrosymmetric N—H⋯O hydrogen-bonded dimers. The dimers are linked via C—H⋯O and C—H⋯π hydrogen bonds, forming a chain along the b axis.