title: (±)-(4aR,5R,8S,8aR)-8-(tert-Butyl-dimethyl-sil-yloxy)-2,5,8a-trimethyl-4a,5,8,8a-tetra-hydro-naphthalene-1,4-dione.
abstract: In the title compound, C19H30O3Si, both rings adopt a half-boat conformation. Overall, the mol-ecule approximates a U-shape as the cyclo-2-ene-1,4-dione and butyl-dimethyl-sil-yloxy substituents lie to the same side of the central cyclo-hexene ring; the methyl substituent lies to the other side of the mol-ecule. In the crystal, linear supra-molecular chains along the b axis are sustained by C-H⋯O inter-actions.
authors.affiliation: Department of Chemistry, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil.
authors.forename: Felix N
authors.initials: FN
authors.lastname: Delling
authors.forename: Julio
authors.initials: J
authors.lastname: Zukerman-Schpector
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Brocksom
authors.forename: Ursula
authors.initials: U
authors.lastname: Brocksom
authors.forename: Fernanda G
authors.initials: FG
authors.lastname: Finelli
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink