Ellagitannins

molecule resembling two gallic acid molecules assembled "head to tail" and bound by two lactone links and a C–C bond

chemical compound

oxidatively coupled derivative of gallic acid

thumb|right|130px|Castalagin is a representative ellagitannin, characterized by coupled gallic acid substituents The ellagitannins are a diverse class of hydrolyzable tannins, a type of polyphenol formed primarily from the oxidative linkage of galloyl groups in 1,2,3,4,6-pentagalloyl glucose. Ellagitannins differ from gallotannins, in that their galloyl groups are linked through C-C bonds, whereas the galloyl groups in gallotannins are linked by depside bonds.

Corilagin is an ellagitannin. Corilagin was first isolated in 1951 from Dividivi extract and from Caesalpinia coriaria, hence the name of the molecule. It can also be found in Alchornea glandulosa and in the leaves of Punica granatum (pomegranate).

chemical compound

Castalagin is an ellagitannin, a type of hydrolyzable tannin, found in oak and chestnut wood and in the stem barks of Terminalia leiocarpa and Terminalia avicennoides.

chemical compound

chemical compound

Casuarictin is an ellagitannin, a type of hydrolysable tannin. It can be found in Casuarina and Stachyurus species.

Castalin is an ellagitannin. It can be found in oak wood and in Melaleuca quinquenervia leaves.

natural phenol found in numerous fruits

Grandinin is an ellagitannin. It can be found in Melaleuca quinquenervia leaves and in oaks species like the North American white oak (Quercus alba) and European red oak (Quercus robur). It shows antioxydant activity. It is an astringent compound. It is also found in wine, red or white, aged in oak barrels.

chemical compound

chemical compound

chemical compound

chemical compound

chemical compound

chemical compound

chemical compound