3d image of 1,6-digalloyl glucose skeletal formula

digalloyl glucose gallotannin molecular acid gallic tannic hydrolysable tannin polyphenol monomer tannase oak 3d rendering chemistry chemical biochemistry organic biology molecule structural structure formula skeletal geometry substance matter material agent stuff compound component reagent reaction herbal phytochemicals phytotherapy plant metabolite metabolism biosynthesis cycle mechanism pathway catabolism aromatic aromaticity ring