Flavogallonic acid is a hydrolysable tannin that can be found in valonea oak (Quercus macrolepis in chestnut wood or in Terminalia
Kaynak: Flavogallonic acid

1831 20 Maximilian Nierenstein prepared this substance from algarobilla , dividivi, oak bark, pomegranate, myrabolams, and valonea in 1905.
Kaynak: Ellagic acid