Ito Tetsuro, Ali Zulfiqar, Furusawa Miyuki, Iliya Ibrahim, Tanaka Toshiyuki, Nakaya Ken-ichi, Murata Jin, Darnaedi Dedy, Oyama Masayoshi, Iinuma Munekazu
Gifu Prefectural Institute of Health and Environmental Sciences, 1-1 Naka-fudogaoka, Kakamigahara 504-0838, Japan.
Chem Biodivers. 2005 Dec;2(12):1673-84. doi: 10.1002/cbdv.200590137.
Five new resveratrol (=5-[(E)-2-(4-hydroxyphenyl)ethenyl]benzene-1,3-diol) tetramers, upunaphenols H-J (1-3) and trans-(4) and cis-upunaphenol K (5), were isolated from the stem of Upuna borneensis (Dipterocarpaceae). Their structures were elucidated on the basis of 1D- and 2D-NMR as well as FAB-MS data. Compounds 1-3 bear a rare biphenyl bond in their frameworks. Compounds 1 and 2 have an unprecedented nonacyclic fused ring system, and compounds 2 and 3 have symmetrical structures.
从婆罗洲乌木（龙脑香科）的茎中分离出五种新的白藜芦醇（=5-[(E)-2-(4-羟基苯基)乙烯基]苯-1,3-二醇）四聚体，即乌木酚H-J（1-3）、反式-（4）和顺式-乌木酚K（5）。基于一维和二维核磁共振以及快原子轰击质谱数据阐明了它们的结构。化合物1-3在其骨架中含有一个罕见的联苯键。化合物1和2具有前所未有的九元稠环体系，化合物2和3具有对称结构。
