1′-Methyl-4′-(4-methyl­phen­yl)dispiro­[indane-2,3′-pyrrolidine-2′,3′′-indoline]-1,2′′-dione

In the title mol­ecule, C₂₇H₂₄N₂O₂, the pyrrolidin-2-one ring is almost planar (r.m.s. deviation = 0.003 Å), the pyrrolidine ring has an envelope conformation (the N atom is the flap atom) and the cyclo­penta­none ring is twisted about the C_q—C_m bond (q = quaternary and m = methylene). The ketone O atoms are directed to opposite sides of the mol­ecule. Supra­molecular chains along the a axis are formed in the crystal packing mediated by N—H...N and C—H...O inter­actions. These are connected into layers in the ab plane via C—H...π inter­actions.