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HPLC comparative chromatograms of (A)—standards: 1 gallic acid, 2 protocatechuic acid, 3 catechin, 4 vanillic acid, 5 epicatechin, 6 caffeic acid, 7 syringic acid, 8 rutin, 9 ferulic acid, 10 p-coumaric acid, 11 hesperidin, 12 rosmarinic acid, 13 salicylic acid, 14 quercetin, and 15 kaempferol; (B) crude extract from summer frozen sample; (C) crude extract from autumn frozen sample; (D) crude extract from summer dried sample; and (E) crude extract from autumn dried sample.
