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The mechanism of direct reactions between malvidin 3-O-glucoside (Mv3glc) and a flavanol monomer, (−)-epicatechin, was studied in model solutions in the pH range 2.0–6.0. The direct reactions are strongly related to pH. The rate of Mv3glc and epicatechin disappearance increased with pH. Nucleophilic addition of epicatechin onto the flavylium form of Mv3glc took place at all pH values. At pH 2.0, the...
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