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Identification of Anthocyanin-Flavanol Pigments in Red Wines by NMR and Mass Spectrometry

2002; American Chemical Society; Volume: 50; Issue: 7 Linguagem: Inglês

10.1021/jf0111561

1520-5118

Nuno Mateus, Artur M. S. Silva, Celestino Santos‐Buelga, Julián C. Rivas‐Gonzalo, Víctor de Freitas,

Tea Polyphenols and Effects

Three newly formed Port wine pigments were isolated by Toyopearl HW-40(s) gel chromatography and semipreparative HPLC. Furthermore, the pigments were identified by mass spectrometry (LC/MS) and NMR techniques (1D and 2D). These anthocyanin-derived pigments showed UV-visible spectra different from those of the original grape anthocyanins. These pigments correspond to malvidin 3-glucoside linked through a vinyl bond to either (+)-catechin, (-)-epicatechin, or procyanidin dimer B3 [(+)-catechin-(+)-catechin]. NMR data of these pigments are reported for the first time.