Structural identification of two metabolites of catechins and their kinetics in human urine and blood after tea ingestion - Li,C.; Lee,M.-J.; Sheng,S.; Meng,X.; Prabhu,S.; Winnik,B.; Huang,B.; Chung,J.Y.; Yan,S.; Ho,C.-T.; Yang,C.S. (Chem Res Toxicol, 2000)