title: Sesquiterpenoids from Hedychium yunnanense and Porana discifera, and the structural revision of two sesquiterpenoids from Laggera pterodonta.
abstract: A new eudesmane-type sesquiterpenoid, hedytriol (1), was isolated from Hedychium yunnanense (Zingiberaceae). By means of chemical and spectroscopic methods, the structure of 1 was determined as ( - )-7aH-eudesmane-1beta, 4alpha, 11-triol. A new ent-eudesmane sesquiterpenoid, disciferitriol (2), was isolated from Porana discifera (Convolvulaceae), which was exactly the enantiomer of hedytriol (1). The structures of pterodondiol (3a) and pterodontriol B (3), previously isolated from Laggera pterodonta, were revised on the basis of X-ray diffraction, as well as chemical transformations.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Reeources in West China, Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming 650204, Yunnan, China.
authors.forename: W-M
authors.initials: WM
authors.lastname: Zhu
authors.forename: Q
authors.initials: Q
authors.lastname: Zhao
authors.forename: S-L
authors.initials: SL
authors.lastname: Li
authors.forename: X-J
authors.initials: XJ
authors.lastname: Hao
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D027722:Convolvulaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014961:X-Ray Diffraction; D030521:Zingiberaceae / Q000737:chemistry*
chemical_list: D012717:Sesquiterpenes