Roburin A: Difference between revisions

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Revision as of 08:28, 24 July 2011

Roburin A
Identifiers

Properties
Chemical formula	C₈₂H₅₀O₅₀
Molar mass	1835.24 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Y verify (what is ?) Infobox references

Chemical compound

Roburin A is a tannin found in oak wood (Quercus robur and Quercus petraea or Quercus alba) or oak cork (Quercus suber).

It is a dimeric compound, composed of two vescalagin subunits probably linked through an ether bond between the diphenoyl group of one subunit and the triphenoyl moiety of the other one.

References

Variability of wood extractives among Quercus robur and Quercus petraea trees from mixed stands and their relation to wood anatomy and leaf morphology. J.R. Mosedale, F. Feuillat, R. Baumes, J.-L. Dupouey, and J.-L. Puech, Can. J. For. Res., 1998, 28, pp. 994–1006
Identification and sensory evaluation of dehydro- and deoxy-ellagitannins formed upon toasting of oak wood (Quercus alba L.). Glabasnia A, Hofmann T., J. Agric Food Chem. 16 May 2007;55(10), pp. 4109-4118, Epub 2007 Apr 20
Changes in Tannic Composition of Reproduction Cork Quercus suber throughout Industrial Processing. Estrella Cadahía, Elvira Conde, Brígida Fernández de Simón and María Concepción García-Vallejo, J. Agric. Food Chem., 1998, 46 (6), pp. 2332–2336, doi:10.1021/jf9709360
Roburin A, A dimeric ellagitannin from heartwood of Quercus robur. Catherine L.M. Herve du Penhoat, Veronique M.F. Michon, Abdelhamid Ohassan, Shuyun Peng, Augustin Scalbert and Douglas Gage, Phytochemistry, Volume 30, Issue 1, 1991, pp. 329-332, doi:10.1016/0031-9422(91)84148-L

v t e Types of hydrolysable tannins
Carbohydrates	Glucose Quinic acid Shikimic acid
Phenolic	gallic acid \| Ellagic acid \| Vanillic acid
Types	Ellagitannins Gallotannins
unclassified	1,2-di-O-galloyl-3-O-digalloyl-4,6-O-(S)-hexa- hydroxydiphenoy-β-D-glucose 2,3-(S)-Hexahydroxydiphenoyl-D-glucose Alienanin B Alunusnin A Aromatinin A Balanophotannin D, E, F and G Burkinabin A, B and C Castavaloninic acid Cinchotannic acid Cocciferin D2 Emblicanins (Emblicanin A and Emblicanin B) Euprostin A Flavogallonic acid Flavogallonic acid dilactone Heterophylliin D Helioscopin A (1,6-(S)-hexahydroxydiphenoyl-2,4-(R)-elaeocarpusinoyl-3-O-galloyl-β-D-glucose) Helioscopin B (1,3,6-tri-O-galloyl-2,4-(R)-elaeocarpusinoyl-β-D-glucose) Helioscopinin A (1,6-(S)-hexahydroxydiphenoyl-2,4-(S)-dehydrohexahydroxydiphenoyl-3-O-galloyl-β-D-glucose) Helioscopinin B (1,6-(S)-hexahydroxydiphenoyl-3-O-galloyl-β-D-glucose) Hipophaenin D Isostrictinin Kinotannic acid Platycaryanin A Rugosin C, D and F Squarrosanin A Strictinin Syzyginin A Tannic acid Tellimagrandin I Tercatin Tergallagin Vescalin Vescavaloneic acid/Castavaloneic acid
Other	Tannin sources Tannate

Template:Natural-phenol-stub

Category:

Ellagitannins