Sesquiterpenoids from Hedychium yunnanense and Porana discifera, and the structural revision of two sesquiterpenoids from Laggera pterodonta.
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.
Zhu
W-M
WM
State Key Laboratory of Phytochemistry and Plant Reeources in West China, Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming 650204, Yunnan, China.
Zhao
Q
Q
Li
S-L
SL
Hao
X-J
XJ
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*
D012717:Sesquiterpenes