(1SR,3RS,3aSR,6aRS)-Methyl 5-methyl-4,6-dioxo-3-[2-(trifluoro­meth­yl)phen­yl]octa­hydro­pyrrolo­[3,4-c]pyrrole-1-carboxyl­ate

In the title compound, C₁₆H₁₅F₃N₂O₄, the relative stereochemistry of the four stereogenic C atoms has been determined. The carb­oxy­methyl and 2-(trifluoro­meth­yl)­phenyl substituents of the pyrrolidine cycle have a cis mutual arrangement. The five-membered saturated aza­cycle adopts an envelope conformation with the N atom occupying the flap position. In the crystal, adjacent mol­ecules are combined in centrosymmetric dimers by two weak N—H...O hydrogen bonds.