Procyanidin xylosides from the bark of Betula pendula |
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| Affiliation: | 1. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Systems Analysis, Integrated Assessment and Modelling, 8600, Dübendorf, Switzerland;2. ETH Zurich, Department of Environmental Systems Science, 8092, Zurich, Switzerland;1. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;2. School of Mathematics & Physics, Changzhou University, Changzhou 213164, China;3. State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China;1. Division of Superconductivity and Magnetism, Felix-Bloch-Institute for Solid-state Physics, University of Leipzig, 04103 Leipzig, Germany;2. Chair for Surface Science and Corrosion Department Material Science and Engineering, University of Erlangen, D-91058 Erlangen, Germany;3. Institute of Medical Physics and Biophysics, University of Leipzig, 04107 Leipzig, Germany |
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| Abstract: | 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. |
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