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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Structure elucidation of peonidin 3,7-o-β-diglucoside isolated from Garnacha Tintorera (Vitis vinifera L.) grapes.
Journal of Agricultural and Food Chemistry 2010 October 28
Red wines made from Garnacha Tintorera grapes (also known as Alicante Bouschet and one of the few so-called teinturier Vitis vinifera grape cultivars, because its berry flesh is also red-colored) are usually blended with other red wines as a natural way for enhancing the color intensity of red wines. The phenolic composition of Garnacha Tintorera grapes showed already described interesting features such as the occurrence of unusual anthocyanins (pelargonidin-based anthocyanins and a peonidin dihexoside) that had not been previously described in V. vinifera cultivars. The isolation and further structure elucidation (GC-MS analysis of sugar moieties, UV-vis, LC-MS(n), and (1)H and (13)C NMR spectroscopic data) have allowed the identification of the aforementioned peonidin dihexoside as peonidin 3,7-β-O-diglucoside. This peonidin derivative, in combination with the previously reported pelargonidin-type anthocyanins, can be suggested as a suitable chemical marker for this singular V. vinifera grape cultivar and the wines made totally or partially from this grape cultivar.
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