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A typical HPLC-DAD chromatogram (λ: 520 nm) of the extracts analyzed. The operating conditions are reported in the HPLC section. Peak assignment: 1: delphinidin-3-O-glucoside, 2: cyanidin-3-O-glucoside; 3: cyanidin-3-O-rutinoside; 4: malvidin-3-O-glucoside.
