gallic acid trihydroxybenzoic acid molecule. present in many plants, including oak, tea and sumac. both in the free form and is.

gallic acid trihydroxybenzoic molecule present many plants oak tea sumac both free form phenolic gallnut hazel tannin gallate antioxidant iron gall ink atoms atomic model molecular compound composition chemical chemistry bond structure formula part compounds are represented as spheres conventional color coding hydrogen white carbon grey oxygen red