Ethyl 1′′-benzyl-1′-methyl-2′′-oxodi­spiro­[indeno­[1,2-b]quinoxaline-11,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxyl­ate

In the title compound, C(36)H(30)N(4)O(3), the quinoxaline–indene system is roughly planar, with a maximum deviation from the mean plane of 0.218 Å for the C atom shared with the central pyrrolidine ring. This latter ring forms dihedral angles of 84.54 (7) and 83.91 (8)° with the quinoxaline–indene system and the indole ring, respectively. The central pyrrolidine ring has an envelope conformation with the N atom as the flap, while the pyrrolidine and five-membered rings of the indole group adopt twisted conformation and envelope (with the C atom bearing the quinoxaline–indene system as the flap) conformations, respectively. In the crystal, mol­ecules are linked via weak C—H⋯N hydrogen bonds, forming a chain running along [100].