title: 6β-Acet-oxy-1α,7β,11β,15β-tetra-hydr-oxy-7α,20-ep-oxy-ent-kaur-16-ene.
abstract: The title compound, C(22)H(32)O(7), a natural ent-kaurane diterpenoid also referred to as Maoyecrystal F, was obtained from the medicinal plant Isodon nervosa. There are four rings with the expected cis and trans junctions. Cyclohexane ring A adopts a chair conformation, rings B and C adopt boat conformations, while the five-membered ring has an envelope conformation. The mol-ecules stack along the a axis in the crystal and are linked together by inter-molecular O-H⋯O hydrogen bonds.
authors.affiliation: School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, People's Republic of China.
authors.forename: Fu-Lin
authors.initials: FL
authors.lastname: Yan
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Di
authors.forename: Chuang
authors.initials: C
authors.lastname: Feng
authors.forename: Rui-Jie
authors.initials: RJ
authors.lastname: Hou