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Chemical structures of blueberry anthocyanins. Top: Structure of malvidin-3-(6″-acetoyl)-glucoside showing A, B and C rings of anthocyanidin core and conjugation of glycoside (glucose, galactose or arabinose) and acyl groups. Bottom: Substitution of hydroxyl and methoxy groups on B-ring structures corresponding to delphinidin, cyanidin, petunidin and peonidin anthocyanidin cores.
