In the title compound, C(27)H(20)BrNO(3), the pyrrolidine ring adopts a half-chair conformation, while the other five-membered rings adopt flattened envelope conformations with the spiro C atoms as the flap atoms. An intra-molecular C-H⋯O hydrogen bond occurs, generating an S(6) ring. In the crystal, mol-ecules are connected via weak C-H⋯O hydrogen bonds, forming chains along the c axis.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3247508PMC
http://dx.doi.org/10.1107/S1600536811044515DOI Listing

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