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In the title compound, C31H22N4O4, the pyrrolidine ring adopts a twist conformation on the N-CH2 bond. The indolin-2-one and the 1H-indole rings are nearly planar (r.m.s. deviations = 0.06 and 0.011 Å, respectively) and are inclined to one another by 34.19 (9)°. The chromene ring system is also nearly planar (r.m.s. deviation = 0.029 Å). It is almost normal to the 1H-indole ring system, with a dihedral angle of 88.71 (8)°, and is inclined to the indolin-2-one ring system by 72.76 (8)°. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds, forming slabs parallel to (10-1). The slabs are linked by C-H⋯O hydrogen bonds, forming a three-dimensional structure.

acta crystallographica. section e, crystallographic communications

Crystal structure of 3′-(1<i>H</i>-indole-3-carbonyl)-1′-methyl-2-oxo-4′-(4-oxo-4<i>H</i>-chromen-3-yl)spiro[indoline-3,2′-pyrrolidine]-3′-carbonitrile

Crystal structure of 3′-(1H-indole-3-carbonyl)-1′-methyl-2-oxo-4′-(4-oxo-4H-chromen-3-yl)spiro[indoline-3,2′-pyrrolidine]-3′-carbonitrile