title: Structure elucidation of peonidin 3,7-o-β-diglucoside isolated from Garnacha Tintorera (Vitis vinifera L.) grapes.
abstract: 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.
authors.affiliation: Instituto Regional de Investigación Científica Aplicada, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad de Castilla-La Mancha, Ronda de Calatrava 7, 13071 Ciudad Real, Spain.
authors.forename: Noelia
authors.initials: N
authors.lastname: Castillo-Muñoz
authors.forename: Peter
authors.initials: P
authors.lastname: Winterhalter
authors.forename: Fabian
authors.initials: F
authors.lastname: Weber
authors.forename: M Victoria
authors.initials: MV
authors.lastname: Gómez
authors.forename: Sergio
authors.initials: S
authors.lastname: Gómez-Alonso
authors.forename: Esteban
authors.initials: E
authors.lastname: García-Romero
authors.forename: Isidro
authors.initials: I
authors.lastname: Hermosín-Gutiérrez
mesh_terms: D000872:Anthocyanins / Q000737:chemistry* / Q000302:isolation & purification; D005638:Fruit / Q000737:chemistry; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D027843:Vitis / Q000737:chemistry*
chemical_list: D000872:Anthocyanins; D005960:Glucosides; D010936:Plant Extracts; C473205:peonidin