Roburin A

Roburin A
Chemical structure of roburin A
Identifiers
132864-75-6 
Properties
C82H50O50
Molar mass 1835.24 g/mol
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Roburin A is a tannin found in oak wood (Quercus robur and Quercus petraea[1] or Quercus alba[2]) or oak cork (Quercus suber[3]).

It is a dimeric compound, composed of two vescalagin subunits probably linked through an ether bond between the diphenoyl group (hexahydroxydiphenic acid or HHDP) of one subunit and the triphenoyl moiety (nonahydroxytriphenic acid) of the other one.[4]

References

  1. ↑ Mosedale, J R; Feuillat, F; Baumes, R; Dupouey, J-L; Puech, J-L (1998). "Variability of wood extractives among Quercus roburand Quercus petraeatrees from mixed stands and their relation to wood anatomy and leaf morphology". Canadian Journal of Forest Research 28 (7): 994–1006. doi:10.1139/x98-066.
  2. ↑ Glabasnia, Arne; Hofmann, Thomas (2007). "Identification and Sensory Evaluation of Dehydro- and Deoxy-ellagitannins Formed upon Toasting of Oak Wood (Quercus alba L.)". Journal of Agricultural and Food Chemistry 55 (10): 4109–18. doi:10.1021/jf070151m. PMID 17444655.
  3. ↑ Cadahía, Estrella; Conde, Elvira; Fernández De Simón, Brígida; García-Vallejo, María Concepción (1998). "Changes in Tannic Composition of Reproduction Cork Quercus suberthroughout Industrial Processing". Journal of Agricultural and Food Chemistry 46 (6): 2332–6. doi:10.1021/jf9709360.
  4. ↑ Herve du Penhoat, Catherine L.M.; Michon, Veronique M.F.; Ohassan, Abdelhamid; Peng, Shuyun; Scalbert, Augustin; Gage, Douglas (1991). "Roburin A, A dimeric ellagitannin from heartwood of Quercus robur". Phytochemistry 30: 329–32. doi:10.1016/0031-9422(91)84148-L.