Methyl 1-ethyl-3′-[hy­droxy(naphthalen-1-yl)meth­yl]-1′-methyl-2-oxo­spiro­[indo­line-3,2′-pyrrolidine]-3′-carboxyl­ate

In the title compound, C₂₇H₂₈N₂O₄, the pyrrolidine ring adopts a twist conformation. The plane of the indole ring is almost perpendicular to that of the pyrrolidine ring, making a dihedral angle of 88.50 (6)°. The planes of the naphthyl ring system and the pyrrolidine ring are tilted by an angle of 55.86 (5)°. The mol­ecular conformation is stabilized by intra­molecular O—H...O and O—H...N hydrogen bonds.