title: (4R*,4aS*,4bS*,5R*,10aR*)-4-Hy-droxy-4a,5-dimethyl-2-(propan-2-yl)-1,4,4a,4b,5,6,7,8,10,10a-deca-hydro-phenan-thren-1-one.
abstract: In the title compound, C(19)H(28)O(2), the A ring adopts a chair conformation. Both the B and C rings adopt envelope conformations with the C atoms common to both rings and adjacent to the carbonyl and hydroxyl groups, respectively, lying 0.604 (3) and 0.634 (3) Å out of the mean planes defined by the remaining five C atoms of rings B and C, respectively (r.m.s. deviations = 0.0100 and 0.0157 Å, respectively). The formation of linear supra-molecular C(7) chains along the a axis mediated by hy-droxy-O-H⋯O(carbon-yl) hydrogen bonds is the most prominent feature of the crystal packing.
authors.forename: Ignez
authors.initials: I
authors.lastname: Caracelli
authors.forename: Julio
authors.initials: J
authors.lastname: Zukerman-Schpector
authors.forename: André T Lousada
authors.initials: AT
authors.lastname: Machado
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Brocksom
authors.forename: M Lúcia
authors.initials: ML
authors.lastname: Ferreira
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink