Casuarictin is an

ellagitannin image:Castalagin.svg, 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 link ...

, a type of hydrolysable tannin. It can be found in ''

Casuarina ''Casuarina'', also known as she-oak, Australian pine and native pine, is a genus of flowering plants in the family Casuarinaceae, and is native to Australia, the Indian subcontinent, Southeast Asia, islands of the western Pacific Ocean, and e ...

'' and ''

Stachyurus ''Stachyurus'' is the only genus in the flowering plant family Stachyuraceae, native to the Himalayas and eastern Asia. They are deciduous shrubs or small trees with pendent racemes of 4-petalled flowers which appear on the bare branches before t ...

'' species.Tannins of Casuarina and Stachyurus species. I: Structures of pendunculagin, casuarictin, strictinin, casuarinin, casuariin, and stachyurin. Okuda T., Yoshida T., Ashida M. and Yazaki K., Journal of the Chemical Society, 1983, number 8, pages 1765-1772, It is formed from two

hexahydroxydiphenic acid Hexahydroxydiphenic acid is an organic compound with the formula HO)3C6HCO2Hsub>2. It is the oxidatively coupled derivative of gallic acid It is a white solid, although samples are typically brown owing to oxidation. Occurrence left, 142px, ...

units and one

gallic acid Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6 H2( OH)3CO2H. It is classified as a phenolic acid. It is found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plant ...

unit linked to a

glucose Glucose is a sugar with the Chemical formula#Molecular formula, molecular formula , which is often abbreviated as Glc. It is overall the most abundant monosaccharide, a subcategory of carbohydrates. It is mainly made by plants and most algae d ...

molecule. The molecule is formed from

tellimagrandin II Tellimagrandin II is the first of the ellagitannins formed from 1,2,3,4,6-pentagalloyl-glucose. It can be found in '' Geum japonicum'' and '' Syzygium aromaticum'' (clove).Purification and Characterization of Eugeniin as an Anti-herpesvirus Compou ...

, itself formed from

pentagalloyl glucose Pentagalloylglucose, or more specifically 1,2,3,4,6-penta-''O''-galloyl-β-D-glucose, is the pentagallic acid ester of glucose. It is a gallotannin and the precursor of ellagitannins. Pentagalloylglucose can precipitate proteins, including human ...

via oxidation. Casuarictin is transformed into

pedunculagin Pedunculagin is an ellagitannin. It is formed from casuarictin via the loss of a gallate group. Natural occurrence Pedunculagin is found in plants in orders in the clade Rosidae. It can be found the pericarp of pomegranates (''Punica granatum ...

via loss of a gallate group, and further into

castalagin 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''. Castalagin is the diastereomer of vescalagin in C-1 of the glycosidic c ...

via glucose pyranose ring opening.

Oligomers

Sanguiin H-6 Sanguiin H-6 is an ellagitannin. Natural occurrence Sanguiin H-6 can be found in Rosaceae such as the great burnet ('' Sanguisorba officinalis''), in strawberries ('' Fragaria × ananassa'') and in ''Rubus'' species such as red raspberries (''R ...

is a dimer,

Lambertianin C Lambertianin C is an ellagitannin. Natural occurrence Lambertianin C can be found in ''Rubus'' species such as '' Rubus lambertianus'', in cloudberries ('' Rubus chamaemorus'') and in red raspberries (''Rubus idaeus''). Chemistry Lambertiani ...

is trimer and

lambertianin D Lambertianin D is an ellagitannin found in ''Rubus lambertianus''. It is tetramer of casuarictin linked by sanguisorbic acid Sanguisorbic acid is a constituent of some ellagitannins. It is constituted by a hexahydroxydiphenic acid unit linked by ...

is a tetramer of casuarictin.

References

{{Ellagitannin Ellagitannins Lactones