期刊
FOOD CHEMISTRY
卷 259, 期 -, 页码 304-310出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.03.134
关键词
Flavanol; Condensed tannin; Grape; Wine; Epicatechin vanillate
Flavan-3-ols are units incorporating condensed tannin, which are widely present in grape and wine. They play a considerable role in wine sensory perception such as astringency, bitterness and mouth-feel. In grape and wine, the flavan-3-ols reported to date are (epi) catechin, (epi) gallocatechin, (epi) gallocatechin gallate and (epi) catechin glycoside. This study now shows the presence of a new flavan-3-ol epicatechin vanillate in grape seed and red wine. A putative unknown flavan-3-ol derived from grape seed was targeted by LC-HRMS/MS. Fractionation and purification by centrifugal partition chromatography and Prep HPLC allowed us to obtain the pure new flavan-3-ol. NMR and HRMS data revealed this compound to be epicatechin-3-O-vanillate. Quantification analysis results showed that epicatechin vanillate present in grape seed and red wine in the mu g/g dry seed and the mu g/L concentration range, respectively.
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