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Chemical structure of anthocyanins from purple-fleshed sweet potato (Ipomoea batatas cultivar Ayamurasaki).
Me: methyl; Cy: cyanidin; Pn: peonidin; Caf: (E)-cafferic acid; Sop: sophoroside; PHB: p-hydroxybenzoic acid; Fer: (E)-ferulic acid; Glc: glucopyranoside.
