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HPLC chromatographic profiles found in vine leaves infusions at 325 and 525 nm. Legend peaks: at 325 nm (1) trans-caftaric acid; (2) coutaric acid; (3) quercetin-3-O-glucoside; (4) rutin; (6) unknow flavonol; at 525 nm (2) petunidin-3-O-monoglucoside; (3) peonidin-3-O-monoglucoside; (4) malvidin-3-O-monoglucoside.
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