title: (3R,6R,12R,20S,24R)-20,24-Ep-oxy-dammarane-3,6,12,25-tetra-ol.
abstract: In the title compound, C(30)H(52)O(5), the three six-membered rings are in chair conformations, the five-membered ring is in an envelope form and the tetra-hydro-furan ring has a conformation inter-mediate between half-chair and sofa. Intra-molecular O-H⋯O hydrogen bonds may influence the conformation of the mol-ecule. In the crystal, mol-ecules are linked by inter-molecular O-H⋯O hydrogen bonds, forming a three-dimensional network.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Huan-Mei
authors.initials: HM
authors.lastname: Guo
authors.forename: Wen-Juan
authors.initials: WJ
authors.lastname: Li
authors.forename: Yi-Jun
authors.initials: YJ
authors.lastname: Gao
authors.forename: Qing-Guo
authors.initials: QG
authors.lastname: Meng