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Constituents of Yunnan black tea flavonoids. (a) Standard chromatograms. (b) Yunnan black tea flavonoids chromatograms. 1, catechin; 2, gallocatechin gallate; 3, rutin; 4, hyperoside; 5, epicatechin gallate; 6, dihydroquercetin; 7, quercetin; 8, myricetin; 9, sulphuretin.
