[Studies on antioxidant constituents from black tea].

[Studies on antioxidant constituents from black tea].

Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials (2005-04-27)

Yalun Su, Ruoyun Chen, Zhenyu Chen

摘要

Qimen black tea has strong inhibitory activity of canola oil oxidation. Four antioxidant compounds, theaflavin (TF1), theaflavin-3-gallate (TF2A), theaflavin-3'-gallate (TF2B) and theaflavin digallate (TF3), were isolated from acetic acetate extract of black tea by silica gel and sephadex LH-20 column chromatography. TF1, TF2A, TF2B and TF3, have stronger antioxidant activity than that of BHT (Butylated hydorxytoluene).