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In the title compound, methyl 2-{6′-ethyl-2′,3′,5′,6′,7′,8′-hexahydro-4-hydroxy-2-oxo- spiro­[1H-indole-3(2H),1′(8a'H)-indolizin]-7′-yl}-3-methoxyacrylate, C22H28N2O5, the indole molecule is not planar. The planarity of the atom group C13—N1—C2=O1 of the indole moiety and the short N1—C2 bond of 1.363 (11) Å are due to delocalization of the benzoid electrons, which extend over the atoms N1, C2 and O1. The five-membered ring of the indolizine moiety is puckered and the six-membered ring fused to it has a normal chair conformation. The methoxy­carbonyl and the methoxy groups have a trans configuration about the C16 =C17 bond in the acrlyl moiety. The structure is stabilized by intramolecular hydrogen bonding of the type O—H...N and intermolecular hydrogen bonding of the type N—H...O.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks global, 1

fcf

Structure factor file (CIF format)
Contains datablock bm1144

CCDC reference: 129687

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