(1'S,12'R,13'S,17'S)-15',15'-Dimethyl-1,2-dihydro-11',14',16',18'-tetra-oxa-7'-aza-spiro-[indole-3,8'-penta-cyclo-[10.6.0.0(2,9).0(3,7).0(13,17)]octa-deca-ne]-2,10'-dione

Acta Crystallogr Sect E Struct Rep Online. 2013 Mar 2;69(Pt 4):o466. doi: 10.1107/S1600536813005436. Print 2013 Apr 1.

Abstract

In the title compound, C22H24N2O6, the indole ring has a twist conformation and the tetra-hydro-2H-pyran-2-one ring a half-chair conformation. One of the pyrrolidine rings adopts an envelope conformation on the N atom, while the other has a twist conformation; the 'butterfly' angle between their mean planes is 62.98 (11)°. The dioxolane ring adopts a twist conformation and the tetra-hydro-furan ring has an envelope conformation on the C atom in the fused tetra-hydro-2H-pyran-2-one ring adjacent to the O atom of the tetra-hydro-furan ring. The 'butterfly' angle between the mean planes of these two five-membered rings is 69.14 (10)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, forming chains along the a axis.