... )-benzopyran-3,5,7-triol 3-(3,4, 5-trihydroxybenzoate),(-)-Epigallocatechin gallate, (-)-Epigallocatechin gallate 3-O-gallateMolecular Formula: C22H18O11Molecular Weight: 458.4Solubility: Clear colorless ... Polyphenol 90% min, Tea Catechins 70% minDark YellowHealth foodFood, Beverage (-)-Epigallocatechin gallate (egcg), an most potent antioxidant polyphenols of green tea, is ...