(±)-(4aR,5R,8S,8aR)-8-(tert-Butyl­dimethyl­sil­yloxy)-2,5,8a-trimethyl-4a,5,8,8a-tetra­hydro­naphthalene-1,4-dione

In the title compound, C₁₉H₃₀O₃Si, both rings adopt a half-boat conformation. Overall, the mol­ecule approximates a U-shape as the cyclo-2-ene-1,4-dione and butyl­dimethyl­sil­yloxy substituents lie to the same side of the central cyclo­hexene ring; the methyl substituent lies to the other side of the mol­ecule. In the crystal, linear supra­molecular chains along the b axis are sustained by C—H...O inter­actions.