Glucogallin is chemical compound formed from gallic acid and β-D-glucose.

It can be found in oaks species like the North American white oak (Quercus alba), European red oak (Quercus robur) [1] and Amla fruit (Phyllanthus emblica).

This enzyme can be found in oak leaf preparations.

β-Glucogallin is aldose reductase inhibitor.

Half-life of β-Glucogallin in human body seems to be unknown.