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The synthesis and structural characterization by LC–MS and NMR of a new blue amino-based pyranoanthocyanin-derived pigment is presented from the reaction of A-type vitisin and 4-(dimethylamino)-cinnamic acid. The structure of the new compound is similar to portisin B being the hydroxyl and or methoxyl groups from the cinnamyl moiety substituted by a dimethylamino group. The presence of this amino...
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