(1R,2S,4S,4aS,8S,8aS)-4-Hy­droxy-8,8a-dimethyl-10-oxo-2,3,4,7,8,8a-hexa­hydro-1H-4a,1-(ep­oxy­methano)­naphthalen-2-yl acetate

The title compound, C₁₅H₂₀O₅, presents a bis­norsesquiterpene skeleton, with a trans-deca­line backbone constrained by the lactone bridge. The α-hy­droxy substituent and the methyl group belonging to the two deca­line rings are in axial positions, whereas the other methyl group and the acyl group occupy the sterically preferred equatorial positions. The mol­ecular structure is stabilized by an intra­molecular C—H...O hydrogen bond. In the crystal, mol­ecules are linked into chains along [010] by O—H...O hydrogen bonds