Diverse class of hydrolyzable tannins, a type of polyphenol
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.[1]
Ellagitannins contain various numbers of hexahydroxydiphenoyl units, as well as galloyl units and/or sanguisorboyl units bounded to sugar moiety. In order to determine the quantity of every individual unit, the hydrolysis of the extracts with trifluoroacetic acid in methanol/water system is performed. Hexahydroxydiphenic acid, created after hydrolysis, spontaneously lactonized to ellagic acid, and sanguisorbic acid to sanguisorbic acid dilactone, while gallic acid remains intact.[2]
Ellagitannins generally form macrocycles, whereas gallotannins do not.
^MALDI-TOF Mass Spectrometric Analysis of Hydrolysable Tannins
^Structural diversity and antimicrobial activities of ellagitannins. T. Yoshida, Ts. Hatano, H. Ito, T. Okuda, S. Quideau (Ed.), Chemistry and Biology of Ellagitannins, World Scientific Publishing, Singapore (2009), pages 55–93
The ellagitannins are a diverse class of hydrolyzable tannins, a type of polyphenol formed primarily from the oxidative linkage of galloyl groups in 1...
The pomegranate ellagitannins, which include punicalagin isomers, are ellagitannins found in the sarcotestas, rind (peel), bark or heartwood of the pomegranate...
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structurally diverse. Polyphenols include flavonoids, tannic acid, and ellagitannin, some of which have been used historically as dyes and for tanning garments...
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acids in the achene (seed) oil. Garden strawberries contain the dimeric ellagitannin agrimoniin which is an isomer of sanguiin H-6. Other polyphenols present...
treat burns and insect bites.[citation needed] Sanguiin H-6 is a dimeric ellagitannin that can be found in S. officinalis. Ziyuglycoside II is a triterpenoid...
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of pomegranate juice results from the presence of anthocyanins and ellagitannins. P. granatum is grown for its vegetable crop, and as ornamental trees...
such as ellagitannins. They are produced in the gut, and found in the urine in the form of urolithin B glucuronide after absorption of ellagitannins-containing...
refer to: Corilagin, an ellagitannin Punicacortein A, an ellagitannin Punicacortein B, an ellagitannin Strictinin, an ellagitannin This set index page lists...
Punicalagin (Pyuni-cala-jen) is an ellagitannin, a type of phenolic compound. It is found as alpha and beta isomers in pomegranates (Punica granatum),...
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round, crisp-fleshed corms are common in Chinese food. Bicornin is an ellagitannin found in T. bicornis. The genus has an extensive fossil record, with...
leafy bracts; the fruit are similarly spiky). F. vesca contains the ellagitannin agrimoniin which is an isomer of sanguiin H-6. Musk strawberry Strawberry...
esters). Plants produce ellagic acid from hydrolysis of tannins such as ellagitannin and geraniin. Urolithins are gut flora human metabolites of dietary ellagic...
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cyanidin-3-(2(G)-glucosylrutinoside) and cyanidin-3-glucoside, the two ellagitannins sanguiin H-6 and lambertianin C are present together with trace levels...
official antidiarrheic drug in Japan. It is called ゲンノショウコ. Geraniin is an ellagitannin found in G. thunbergii. Luger, P.; Weber, M.; Kashino, S.; Amakura, Y...
tannins isolated from Syzygium aromaticum: Structure of a new c-glucosidic ellagitannin and spectral features of tannins with a tergalloyl group". Heterocycles...
regions of Finland due to sunlight exposure, rainfall or temperature. The ellagitannins lambertianin C and sanguiin H-6 are also present. Genotype of cloudberry...
juglone had concentrations of 2-4% fresh weight. Walnuts also contain the ellagitannin, pedunculagin. Regiolone has been isolated with juglone, betulinic acid...
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