Malvidin-3-coumaroylglucoside

Formation of Portisins in model solution The formation of a Portisin was monitored at 35 °C in 20% aqueous ethanol (pH=2.0) in a 2 mL screw cap vial containing 0.2 mg of malvidin-3-coumaroylglucoside pyruvic acid adduct previously isolated (11) and 0.33 mg of (+)-catechin. The total volume of die solution was set to 50% of the vial capacity. After 15 days of reaction, the solution was analyzed by HPLC using the conditions described above. 

Fig. 2.101. Chromatograms of Cabernet Sauvignon and TempraniUo wines recorded at 520 nm. Peak identification Df-3-GL = delphinidin-3-O-glucoside Cy-3-Gl = cyanidin-3-O-glucoside Pt-3-Gl = petunidin-3-O-glucoside Pn-3-Gl = peonidin-3-O-glucoside Mv-3-Gl = maMdin-3-O-glucoside Pn-3-Gl-Ac = paeonidin-3-O-acetylglucoside Mv-3-Gl-Ac = maMdin-3-O-acetylglucoside Pn-3-Gl-Cm = peonidin-3-coumaroylglucoside Mv-3-Gl-Cm = malvidin-3-coumarylglucoside. Reprinted with permission from E. Revilla et al. [235].

Petunidin-3-(6-0-p-coumaroylglucoside) Malvidin-3-0-glucoside-4-vinyl-catechin Malvidin-3-(6-0-p-coumaroylglucoside)-8-ethyl-(epi )catechin... 

Complex anthocyanin patterns are observed in red grapes. The 3-glucosides, 3-acetylglucosides and 3-/J-coumaroylglucosides of cyanidin, peonidin, delphinidin, petunidin and malvidin are present. 

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