Ito Hideyuki, Yamaguchi Koji, Kim Tae-Hoon, Khennouf Seddik, Gharzouli Kamel, Yoshida Takashi
Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Okayama, 700-8530, Japan.
J Nat Prod. 2002 Mar;65(3):339-45. doi: 10.1021/np010465i.
Three new hydrolyzable tannins, cocciferins D(1) (1), D(2) (2), and T(1) (4), were isolated from the leaves of Quercus coccifera. Cocciferin D(2) (2) and two additional new tannins, cocciferins D(3) (3) and T(2) (5), were also obtained from the leaves of Quercus suber. Their oligomeric structures were elucidated on the basis of spectroscopic methods and chemical evidence. Compounds 2, 3, and 5 were rare oligomers possessing glucose cores with both open-chain and pyranose forms.
从胭脂虫栎的叶子中分离出三种新的可水解单宁，即胭脂虫素D(1)（1）、D(2)（2）和T(1)（4）。还从软木栎的叶子中获得了胭脂虫素D(2)（2）以及另外两种新的单宁，即胭脂虫素D(3)（3）和T(2)（5）。基于光谱方法和化学证据阐明了它们的低聚结构。化合物2、3和5是罕见的低聚物，具有开链和吡喃糖形式的葡萄糖核心。
