Tannins and Related Compounds. CIX. Isolation of Alienanins A and B, Novel C, C-Linked Ellagitannin Dimers from Quercus aliena BLUME
Tannins and Related Compounds. CIX. Isolation of Alienanins A and B, Novel C, C-Linked Ellagitannin Dimers from Quercus aliena BLUME
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单宁和相关化合物。
DOI：
10.1248/cpb.39.884
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发表时间：
1991
影响因子：
1.7
通讯作者：
I. Nishioka
中科院分区：
文献类型：
--
作者：
G. Nonaka;T. Sakai;K. Mihashi;I. Nishioka
从壳斗科栎树(Quercus Aliena)颖叶中分离得到两个新的可水解性单宁，分别为A(5)和B(13)，其结构经化学和波谱确证为二聚体C-糖苷类单宁，其中六羟基二苯酯通过碳-碳键与C-糖苷C-1原子相连。此外，还对单体C-糖基鞣胶--表单核心素A(1)的结构鉴定作了简要介绍。
Two novel hydrolyzable tannins, alienanins A (5) and B (13), have been isolated from the leaves of Quercus aliena GLUME (Fagaceae), and their structures were elucidated on the basis of chemical and spectroscopic evidence to be dimeric C-glycosidic ellagitannins in which the hexahydroxydiphenoyl ester group is linked to the C-glycosidic C-1 atom through a carbon to carbon linkage. In addition, the structure elucidation of the monomeric C-glycosidic ellagitannin, epipunicacortein A (1), is also described briefly.