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The title molecule, C 20 H 23 NO 7 , the product of nucleophilic cleavage of the 3a,6-ep­oxy bridge in 1-oxo-2-phenyl­octa­hydro-3a,6-ep­oxy­iso­indole-7-carboxyl­ate, comprises a  cis -fused bicyclic system containing a 2-pyrrolidinone ring in an envelope conformation (with the C atom bearing the carboxyl­ate substituent as the flap) and a cyclo­hexane ring in a chair conformation. The carboxyl­ate substituent occupies the equatorial position, whereas the two acet­yloxy substituents are in axial positions. The N atom has a trigonal-planar geometry, the sum of the bond angles being 359.3 (3)°. The dihedral angle between the mean plane of the four planar atoms of the pyrrolidinone ring and the phenyl ring is 25.98 (6)°. In the crystal, mol­ecules are linked into zigzag chains along the  c- axis direction by C—H⋯O hydrogen bonds.

rac-Methyl (3aR*,4S*,5R*,7aR*)-5,7a-bis(acetyloxy)-3-oxo-2-phenyloctahydro-1H-isoindole-4-carboxylate

rac-Methyl (3aR,4S,5R,7aR)-5,7a-bis(acetyloxy)-3-oxo-2-phenyloctahydro-1H-isoindole-4-carboxylate