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In the title compound, C25H36O6, the two central cyclo­hexane rings exhibit a chair conformation. The terminal cyclo­hexene and cyclo­pentane rings are in half-chair and envelope conformations (with the C atom bearing the methyl substit­uent as the flap), respectively. The methyl group of the butyrate chain is disordered over two orientations, with a refined occupancy ratio of 0.742 (6):0.258 (6). Intra­molecular O—H...O and C—H...O hydrogen bonds are observed. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds into chains running parallel to the a axis.
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