(-)-表沒食子兒茶素沒食子酸酯(50 mg)產品是A polyphenol flavonoid that displays antitumor and antioxidant properties. Inhibits telomerase and DNA methyltransferase (DNMT) and blocks the activation of EGF receptors and HER-2 receptors. Also potently and specifically inhibits chymotrypsin-like activity of the proteasome in vitro (IC??= 86-194 nM) and in vivo (IC?? =1 -10 uM).