[(2R,3R)-3-[1-[5,7-dihydroxy-2-(3,4,5-trihydroxybenzoyl)oxy-chroman-3-yl]-3,4,6-trihydroxy-5-oxo-benzo[7]annulen-8-yl]-5,7-dihydroxy-chroman-2-yl] 3,4,5-trihydroxybenzoate

Theaflavin 3,3'-digallate