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HPTLC patterns of soluble phenolic fractions at visible light after derivatization with DPPH solution. Standard phenolic acids were run in parallel (FA: ferulic acid, CA: coumaric acid, DOL: Dolce, SCA: Scagliolo, SCO: Scoppio, SUG: Sugary, POL: Polenta, POP: Pop, RED: Reduno).
