Crystal structure of ethyl (2S,2′R)-1′-benzyl-3-oxo-3H-di­spiro­[1-benzo­thio­phene-2,3′-pyrrolidine-2′,11′′-indeno[1,2-b]quinoxaline]-4′-carboxyl­ate

In the title compound, C(35)H(27)N(3)O(3)S, the spiro-linked five-membered rings both adopt twisted conformations. The pyrrolidine ring makes dihedral angles of 80.5 (1) and 77.4 (9)° with the benzo­thio­phene ring system and the quinoxaline ring system, respectively. The S atom and C=O unit of the benzo­thio­phene ring system are disordered over two opposite orientations in a 0.768 (4):0.232 (4) ratio. The atoms of the ethyl side chain are disordered over two sets of sites in a 0.680 (16):0.320 (16) ratio. In the crystal, mol­ecules are linked by C—H⋯O, C—H⋯N and π–π inter­actions [shortest centroid–centroid distance = 3.4145 (19) Å], resulting in a three-dimensional network.