The title compound, C(26)H(37)NO(5), which was synthesized from monoethano-lamine and maleopimaric acid, consists of two fused and unbridged cyclo-hexane rings. They form a trans ring junction with a chair conformation. The two methyl groups are in axial positions. In the crystal, inter-molecular O-H⋯O hydrogen bonds link adjacent mol-ecules into a layer structure. Two C-H⋯O interactions are also present.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2970322PMC
http://dx.doi.org/10.1107/S1600536809032954DOI Listing

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