4′-Methyl-1H-14′,19′-dioxa-4′-azaspiro[indole-3,5′-tetracyclo[18.4.0.02,6.08,13]tetracosane]-1′(24′),8′,10′,12′,20′,22′-hexaene-2,7′(3H)-dione

Abstract

In the title compound, C29H28N2O4, the indoline ring system is essentially planar, with a maximum deviation of 0.027 (2) Å; the carbonyl O atom lies 0.102 (1) Å out of the least-squares plane of the indole ring. The pyrrolidine ring adopts a C-envelope conformation, with a C atom displaced by 0.643 (2) Å from the mean plane formed by the remaining ring atoms. The pyrrolidine ring makes a dihedral angle of 86.1 (8)° with the indoline ring system. In the crystal, N—H⋯O hydrogen bonds result in the formation of cyclic centrosymmetric dimers [R 2 2(8)]. C—H⋯π inter­actions also occur, leading to a chain along the b-axis direction. There is a rather weak π–π electron inter­action between the pyrrazole and benzene rings, with a centroid–centroid distance of 3.765 (1) Å.