Methyl 4-(4-bromo­anilino)-2′,5-dioxo-5H-spiro­[furan-2,3′-indoline]-3-carboxyl­ate

In the title compound, C₁₉H₁₃BrN₂O₅, the spiro furan ring is almost planar with a maximum deviation of 0.034 (2) Å. The indole unit and the furan ring are normal to each other, making a dihedral angle of 87.82 (8) °. The mol­ecular structure is stabilized by an intra­molecular N—H...O hydrogen bond, which generates an S(6) ring motif. In the crystal, mol­ecules are linked via pairs of N—H...O hydrogen bonds, forming inversion dimers enclosing R²₂(8) ring motifs.