It can be found the pericarp of pomegranates (Punica granatum), in the family Lythraceae, in the order Myrtales.

[1] It is also found in plants in the order Fagales such as walnuts (Juglans regia) in the family Juglandaceae,[2] in Alnus sieboldiana[3] and in the Manchurian alder (Alnus hirsuta var.

microphylla), both species in the family Betulaceae[4] and it is one of the main oak wood ellagitannins along with castalagin, vescalagin, grandinin and roburins A-E (genus Quercus, in the family Fagaceae).

[5] It is also found in the Indian gooseberry (Phyllanthus emblica), a plant in the family Phyllanthaceae, in the order Malpighiales.

[7] Pedunculagin is a highly active carbonic anhydrase inhibitor in vitro.