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A condensation reaction between malvidin 3-glucoside (mv3gl) and catechin (cat) mediated by acetaldehyde and propionaldehyde was conducted in model solutions at two pH values (at 1.5 and 3.2). Acetaldehyde led to the formation of mv3gl-8-ethyl-8-cat (m/z at 809) widely reported in the literature, whereas propionaldehyde led to the formation of mv3gl-8-propyl-8-cat (m/z at 823) and its structural characterization...
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