title: 1'-Methyl-2,2''-dioxoindoline-3-spiro-2'-pyrrolidine-3'-spiro-3''-indoline-4',4'-di-carbonitrile.
abstract: In the title compound, C(21)H(15)N(5)O(2), the pyrrolidine ring adopts a twist conformation. Both the oxindole rings are planar [maximum deviations of 0.076 (1) and 0.029 (1) Å in the two rings] and are oriented at a dihedral angle of 72.7 (1)°. The crystal structure is stabilized by C-H⋯O, N-H⋯O, N-H⋯N and C-H⋯π inter-actions.
authors.forename: P
authors.initials: P
authors.lastname: Ramesh
authors.forename: S S
authors.initials: SS
authors.lastname: Sundaresan
authors.forename: N Vidhya
authors.initials: NV
authors.lastname: Lakshmi
authors.forename: Paramasivan T
authors.initials: PT
authors.lastname: Perumal
authors.forename: M N
authors.initials: MN
authors.lastname: Ponnuswamy