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]
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.
Acutissimin A is a flavono-ellagitannin, a type of tannin formed from the linking of a flavonoid with an ellagitannin.
Epicutissimin A is a flavono-ellagitannin, a type of tannin.
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 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 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 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 is a tannin found in oak wood or oak cork.
Stenophyllanin A is an ellagitannin. It can be found in Cowania mexicana, Coleogyne ramosissima and Quercus stenophylla.
Flavogallonic acid is a hydrolysable tannin that can be found in valonea oak in chestnut wood or in Terminalia myriocarpa.
Punicacortein A is an ellagitannin, a polyphenol compound. It is found in the bark of Punica granatum (pomegranate) and in Osbeckia chinensis.
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 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 is an ellagitannin. It is formed from casuarictin via the loss of a gallate group.
Alnusiin is an ellagitannin found in Alnus sieboldiana.
Bicornin is an ellagitannin found in the Myrtales Trapa bicornis and Syzygium aromaticum (clove).
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 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.
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