1′-(4-Methoxy­benzoyl)­acenaphthene-1-spiro-3′-pyrrolizidine-2′-spiro-3′′-1H-indole-2,2′′(1H,3′′H)-dione

The N—C and C—C bond distances in the pyrrolizidine moiety of the title compound, C₃₃H₂₆N₂O₄, are slightly longer than the normal values. This is due to the steric forces caused by bulky substituents on the pyrrolizidine ring system. The acenaphthene ketone O atom is −0.214 (3) Å from the acenaphthene plane, while the indole ketone O atom is displaced by only 0.004 (3) Å from the indole plane. The molecular structure is stabilized by intramolecular C—H⋯O interactions. The crystal packing is stabilized by C—H⋯O intermolecular interactions.