Phytother Res. 2002 Dec; 16(8): 769-70.

Antioxidant activity of polyphenols from Hypericum triquetrifolium Turra.

Couladis M, Baziou P, Verykokidou E, Loukis A.

Department of Pharmacy, Division of Pharmacognosy, University of Athens, Panepistimioupolis Zografou, 157 71 Athens, Greece.

From the aerial parts of Hypericum triquetrifolium Turra (Guttiferae) 3-8"-biapigenin, quercetin, rutin and chlorogenic acid were isolated. Their structures were elucidated by spectral techniques. Furthermore, the phenolic compounds were tested for antioxidant activity, using an in vitro method based on sodium arachidonoate, bleomycin and thiobarbituric acid with alpha-tocopherol as the reference solution.Copyright 2002 John Wiley & Sons, Ltd.