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Comparison of the main polyphenolic contents of fruits from different varieties of L. barbarum (A) harvested during different seasons (B). (A, rutin; B, p-coumaric acid; C, ferulic acid; D, quercetin; E, kaempferol-3-O-rutinoside; F, isoquercetin; G, chlorogenic acid; H, isorhamnetin-3-O-rutinoside; I, isorhamnetin-3-glucoside; J, isorhamnetin; K, caffeic acid). Different letters across treatments (a, b, c, d) indicate significant differences at p < 0.05.
