title: 3α-Hydr-oxy-ent-atis-16-en-14-one.
abstract: The title compound, C(20)H(30)O(2), is an ent-atisane diterpenoid which was isolated from the roots of Euphorbia kansuensis. The mol-ecule contains five six-membered rings, among which three six-membered rings of the bicyclo-[2.2.2]octane unit adopt boat conformations and two cyclo-hexane rings adopt chair conformations. In the crystal structure, mol-ecules are connected by inter-molecular O-H⋯O hydrogen bonds, forming zigzag chains propagating parallel to [001].
authors.forename: Huan
authors.initials: H
authors.lastname: Wang
authors.forename: Kai-Bei
authors.initials: KB
authors.lastname: Yu
authors.forename: Li-Sheng
authors.initials: LS
authors.lastname: Ding
authors.forename: Xiao-Duo
authors.initials: XD
authors.lastname: Luo
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Zhang