Methyl 4-anilino-2′,5-dioxo-1′,2′-di­hydro-5H-spiro­[furan-2,3′-indole]-3-carboxyl­ate

In the title compound, C₁₉H₁₄N₂O₅, the spiro junction links an oxindole moeity and a furan ring, which subtend a dihedral angle of 83.49 (6)°. The mol­ecular structure features an N—H...O hydrogen bond, which generates an S(6) ring motif. The crystal packing is governed by two N—H...O inter­actions, one of which generates a centrosymmetric R₂²(14) dimer. The other N—H...O inter­action along with a C—H...O hydrogen bond contributes to the formation of a C₂²[R₂²(9)] dimeric chain running along the b-axis direction.