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.

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.