Acta Cryst. (2003). E59, o164-o166 [ doi:10.1107/S1600536803000965 ]
Abstract: The title compound, C31H48O3, was obtained by methylation of 3-oxoolean-12-en-20--oic acid, isolated from the root bark of Austroplenckia populnea (Celastraceae). Rings A, B, D and E are in chair conformations and ring C is in an envelope conformation.
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