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HPLC chromatograms of (a) aqueous extract of the leaves (b) aqueous-methanol extract of the leaves (c) Aqueous extract of the tubers (d) aqueous-methanol extracts of the tubers of orange fleshed sweet potato. 1—Caffeic acid, 2—Hyperoside, 3—Protocatechuic acid, 4—Quercetin, 5—Rutin, 6—Vanillic acid.
