Flavono-ellagitannin

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The Flavono-ellagitannins or complex tannins are a class of tannins formed from the complexation of an ellagitannin with a flavonoid. Flavono-ellagitannins can be found in Quercus mongolica var. grosseserrata . [1] [2]

Tannin class of astringent, bitter plant polyphenolic chemical compounds

Tannins are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids.

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.

Examples

Acutissimin A chemical compound

Acutissimin A is a flavono-ellagitannin, a type of tannin formed from the linking of a flavonoid with an ellagitannin.

Epicutissimin A chemical compound

Epicutissimin A is a flavono-ellagitannin, a type of tannin.

Related Research Articles

<i>Quercus mongolica</i> species of plant

Quercus mongolica, commonly known as Mongolian oak, is a species of oak native to Japan, southern Kuriles, Sakhalin, Manchuria, central and northern China, Korea, eastern Mongolia, and eastern Siberia. The species can grow to be 30 m tall.

Castalagin chemical compound

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

Grandinin chemical compound

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

Tellimagrandin II chemical compound

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).

Stigmella omelkoi is a moth of the Nepticulidae family. It is found in Russia, Japan (Hokkaido) and China (Heilongjiang).

Stigmella dentatae is a moth of the Nepticulidae family. It is found in Japan (Hokkaido), Russia and China (Heilongjiang).

Roburin A chemical compound

Roburin A is a tannin found in oak wood or oak cork.

Stenophyllanin A chemical compound

Stenophyllanin A is an ellagitannin. It can be found in Cowania mexicana, Coleogyne ramosissima and Quercus stenophylla.

Flavogallonic acid chemical compound

Flavogallonic acid is a hydrolysable tannin that can be found in valonea oak in chestnut wood or in Terminalia myriocarpa.

Punicacortein A chemical compound

Punicacortein A is an ellagitannin, a polyphenol compound. It is found in the bark of Punica granatum (pomegranate) and in Osbeckia chinensis.

Punicacortein D chemical compound

Punicacortein D is an ellagitannin, a type of phenolic compound. It is found in the bark and heartwood of Punica granatum (pomegranate). The molecule contains a gallagic acid component.

Casuarinin chemical compound

Casuarinin is an ellagitannin. It is found in the pericarp of pomegranates. It is also found in Casuarina and Stachyurus species and in Alnus sieboldiana.

Pedunculagin chemical compound

Pedunculagin is an ellagitannin. It is formed from casuarictin via the loss of a gallate group.

Alnusiin chemical compound

Alnusiin is an ellagitannin found in Alnus sieboldiana.

Bicornin chemical compound

Bicornin is an ellagitannin found in the Myrtales Trapa bicornis and Syzygium aromaticum (clove).

Sanguisorbic acid chemical compound

Sanguisorbic acid is a constituent of some ellagitannins. It is constituted by a hexahydroxydiphenic acid unit linked by an O-C bond to a gallic acid. The differences with its isomers, valoneic acid and nonahydroxytriphenic acid, are that the hydroxyl that links the hexahydroxydiphenoyl (HHDP) group to the galloyl group belongs to the galloyl group in valoneic acid, while in nonahydroxytriphenic acid, the hexahydroxydiphenic acid unit is linked by a C-C bond to gallic acid.

Nupharin A chemical compound

Nupharin A is an ellagitannin found in Nuphar japonica. It is a molecule with three gallic acid units and one hexahydroxydiphenic acid unit attached to a glucose residue. It is an isomer of punicafolin and tellimagrandin II.

Dichomeris leptosaris is a moth in the family Gelechiidae. It was described by Meyrick in 1932. It is found in Japan.

References

  1. Tannins and related compounds. LXXI. Isolation and characterization of mongolicins A and B, novel flavono-ellagitannins from Quercus mongolica var. grosseserrata. Ishimaru K, Ishimatsu M, Nonaka G, Mihashi K, Iwase Y and Nishioka I, Chemical and pharmaceutical bulletin, 1988, volume 36, no 9, pages 3312-3318, INIST : 19798901
  2. Remarkable Biomimetic Chemoselective Aerobic Oxidation of Flavano-Ellagitannins Found in Oak-Aged Wine. Emilie Petit, Dorothée Lefeuvre, Rémi Jacquet, Laurent Pouységu, Denis Deffieux and Stéphane Quideau, Angewandte Chemie International Edition, 25 October 2013, Volume 52, Issue 44, pages 11530–11533, doi : 10.1002/anie.201305839
  3. Camelliatannin G at pubchem
  4. Mongolicain A at chemspider.com