Theogallin is a

trihydroxybenzoic acid Trihydroxybenzoic acid may refer to the following phenolic acids: * Gallic acid (3,4,5-trihydroxybenzoic acid) * Phloroglucinol carboxylic acid (2,4,6-trihydroxybenzoic acid) O-methylated trihydroxybenzoic acids are: * Eudesmic acid * Syringic aci ...

glycoside In chemistry, a glycoside is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of inactive glycosides. ...

, a type of polyphenolic compound found in tea where it has been characterised as an

umami Umami ( from ), or savoriness, is one of the five basic tastes. It is characteristic of broths and cooked meats. People taste umami through taste receptors that typically respond to glutamates and nucleotides, which are widely present in me ...

enhancing compound. The compound can also be found in ''

Arbutus unedo ''Arbutus unedo'', commonly known as strawberry tree, also called madrone, is an evergreen shrub or small tree in the family Ericaceae, native to the Mediterranean Basin and Western Europe. The tree is well known for its fruits, the arbutus berr ...

'' fruits. In rats, theogallin, or its metabolite

quinic acid Quinic acid is an organic compound with the formula . The compound is classified as a cyclitol, a cyclic polyol, and a cyclohexanecarboxylic acid. It is a colorless solid that can be extracted from plant sources. Quinic acid is implicated in the p ...

, can move through the

blood brain barrier Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away from those same cells. Blood is compo ...

and can have cognition enhancing activities.

References

Quinic acid esters Pyrogallols {{aromatic-stub