title: Crystal structure of methyl 3'-benzamido-4'-(4-meth-oxy-phen-yl)-1'-methyl-spiro-[indeno-[1,2-b]quinoxaline-11,2'-pyrrolidine]-3'-carboxyl-ate.
abstract: In the title compound, C35H30N4O3, the spiro C atom connects the five-membered pyrrolidine ring and the indeno-quinoxaline ring system. The pyrrolidine ring adopts a twist conformation. An intra-molecular N-H⋯N inter-action between the amino group and the pyrazine ring is observed. In the crystal, mol-ecules are linked by a pairs of C-H⋯O hydrogen bonds, forming inversion dimers.
authors.affiliation: Research Department of Physics, S. D. N. B. Vaishnav College for Women, Chromepet, Chennai 600 004, India.
authors.forename: Kuppan
authors.initials: K
authors.lastname: Chandralekha
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Adukamparai Rajukrishnan
authors.initials: AR
authors.lastname: Sureshbabu
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Deivasigamani
authors.initials: D
authors.lastname: Gavaskar
authors.affiliation: Research Department of Physics, S. D. N. B. Vaishnav College for Women, Chromepet, Chennai 600 004, India.
authors.forename: Srinivasakannan
authors.initials: S
authors.lastname: Lakshmi
keywords: N—H⋯N inter­action; crystal structure; indeno­quinoxaline; pyrrolidine; spiro pyrrolizidine