(Fagaceae), new monomeric and dimeric ellagitannins, named carlesiins A (1) and B (2), were isolated from fresh leaves of Castanopsis carlesii along with 55 known compounds. Carlesiin A was identified as 1-O-galloyl-4,6-(S)-tergalloyl-β-D-glucose. Carlesiin B is a macrocyclic ellagitannin dimer with a symmetrical structure composed of two tergalloyl and two glucopyranose moieties. Their structures were elucidated
在对 Castanopsis 物种(Fagaceae)的植物化学和化学分类学研究中,新的单体和二聚鞣花单宁,命名为 carlesiins A (1) 和 B (2),与 55 种已知化合物一起从 Castanopsis carlesii 的新鲜叶子中分离出来。Carlesiin A 被鉴定为 1-O-galloyl-4,6-(S)-tergaloyl-β-D-葡萄糖。Carlesiin B 是一种具有对称结构的大环鞣花单宁二聚体,由两个三萜酰和两个吡喃葡萄糖部分组成。基于光谱和化学证据阐明了它们的结构。简介 栲(Fagaceae)属的物种是在东亚发现的常绿乔木,有时是森林中的优势物种。这些树木常被用作林业或观赏树木,木材是重要的建筑材料。该属约有120种,但只研究了少数物种的化学成分。中国和日本栲树的叶子。是多酚的丰富来源,每个物种都有独特的酚类成分。我们对 Castanopsis sp