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HPLC chromatograms showing composition of catechins a Standards of catechins,1-Catechin, 2-Epigallocatechin gallate, 3- Epicatechin, 4- Epicatechin gallate, 5- Gallocatechin gallate; b Epigallocatechin gallate; c Fraction obtained at 350 bar, 50 °C in SC-CO2; d Fraction obtained using soxtec extraction
