title: Occurrence of anthocyanin-derived pigments in red wines.
abstract: Several anthocyanin-derived pigments that showed UV-visible spectra different from those of the original grape anthocyanins were detected by HPLC-DAD analysis in 1-year-old bottled Port wines from the Douro region. Among these, three malvidin 3-glucoside derived pigments were detected in large amounts, representing approximately 60% of the total anthocyanidin monoglucosides content. These pigments were isolated, purified, and identified by LSI-MS and NMR ((1)H, DQF-COSY, ROESY, HSQC, and HMBC) techniques. The major pigment is malvidin 3-glucoside pyruvic adduct, previously characterized, and the other two corresponded to its respective acetyl and coumaroyl glucoside derivatives. The latter is reported for the first time in red wines.
authors.affiliation: Centro de Investigação em Química, Departamento de Química do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal.
authors.forename: N
authors.initials: N
authors.lastname: Mateus
authors.forename: A M
authors.initials: AM
authors.lastname: Silva
authors.forename: J
authors.initials: J
authors.lastname: Vercauteren
authors.forename: V
authors.initials: V
authors.lastname: de Freitas
mesh_terms: D000872:Anthocyanins / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D005960:Glucosides; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010860:Pigments, Biological / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors; D027843:Vitis / Q000737:chemistry; D014920:Wine / Q000032:analysis*
chemical_list: D000872:Anthocyanins; D005960:Glucosides; D010860:Pigments, Biological; C458419:malvidin-3-glucoside