1-Ethyl-4 '-(1H-indol-3-ylcarbonyl)-1 '-methyl-2,2 ''-dioxodispiro[indoline-3,2 '-pyrrolidine-3 ',3 ''-indoline]-4 ' carbonitrile dimethyl sulfoxide monosolvate

In the title compound, C31H25N5O3 center dot C2H6OS, the three indole/indoline units are all essentially planar with maximum deviations of 0.0172 (3), 0.053 (2) and 0.07 (2) angstrom. The pyrrolidine ring adopts an envelope conformation with the C atoms bearing the 1-ethyl-2-oxoindole substituent (in which the five-membered ring adopts a twisted conformation) as the flap. The dimethyl sulfoxide solvent molecule is disordered over two positions, with an occupancy factor ratio of 0.871 (4): 0.129 (4). The solvent components are linked to the heterocyclic molecule via C-H center dot center dot center dot O and C-H center dot center dot center dot S hydrogen bonds. In the crystal, the solvent components are linked to the heterocyclic molecule via C-H center dot center dot center dot O and C-H center dot center dot center dot S interactions, forming R-2(2) (10) ring motifs. The molecules are further connected into a chain along the a-axis direction via NH center dot center dot center dot O hydrogen bonds.