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

In the title compound, [Fe(C5H5)(C20H21N2O4)], the pyrrolidine ring exhibits an envelope conformation with the spiro-C atom deviating from the plane of the remaining four atoms. The pyrrolidine ring is almost perpendicular to the indolinone ring [dihedral angle = 87.52 (7)°]. The structure is stabilized by an intramolecular O—H...N hydrogen bond and by intermolecular C—H...O and N—H...O interactions