title: 3β-Hydroxy-friedelan-17β-carboxylic acid.
abstract: The title compound, C(30)H(50)O(3), which was isolated from a marine endophytic fungus, is a new friedelan derivative. The mol-ecule contains five six-membered rings, which exhibit boat (ring A), distorted boat (ring B) and chair (rings C-E) conformations. The crystal structure is stabilized by inter-molecular O-H⋯O hydrogen bonds, which link neighbouring mol-ecules into 12-membered rings.
authors.forename: Hai-Yan
authors.initials: HY
authors.lastname: Chen
authors.forename: Cui-Wu
authors.initials: CW
authors.lastname: Lin
authors.forename: Guang-Ying
authors.initials: GY
authors.lastname: Chen
authors.forename: Guang-Chuan
authors.initials: GC
authors.lastname: Ou