Laboratory of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku, Turku, Finland.
Phytochemistry. 2012 Apr;76:178-83. doi: 10.1016/j.phytochem.2012.01.008. Epub 2012 Jan 22.
A procyanidin dimer xyloside, catechin-(4α→8)-7-O-β-xylopyranosyl-catechin, was isolated from the inner bark of Betula pendula and its structure was determined using 1D and 2D NMR, CD and high-resolution ESIMS. Interestingly, the 7-O-β-xylopyranose unit was found to be present in the lower terminal unit of the dimer. In addition to this procyanidin dimer xyloside, an entire series of oligomeric and polymeric procyanidin xylosides was detected. Their structures were investigated by hydrophilic interaction HPLC-HRESIMS. Procyanidin glycosides are still rarely found in nature.
从桦木科植物银桦（Betula pendula）的内皮中分离得到一个原花青素二聚体木糖苷，即儿茶素-(4α→8)-7-O-β-吡喃木糖基儿茶素，其结构通过 1D 和 2D NMR、CD 和高分辨率 ESIMS 确定。有趣的是，二聚体的低末端单元中存在 7-O-β-吡喃木糖单元。除了这种原花青素二聚体木糖苷外，还检测到一系列完整的低聚体和多聚体原花青素木糖苷。通过亲水作用 HPLC-HRESIMS 研究了它们的结构。在自然界中，原花青素糖苷仍然很少见。
