Prorobinetidin

Prorobinetidins are a type of condensed tannins formed from robinetinidol. They form robinetinidin when depolymerized under oxidative conditions.

Mimosa and quebracho tannins are, according to a comparative 13C NMR study of polyflavonoids, found to be predominantly profisetinidin/prorobinetidin-type tannins.[1]

Stryphnodendron adstringens ( the barbatimão), a species of legume found in Brazil, produces prorobinetinidins in its stem bark. These are robinetinidol-(4β → 8)-epigallocatechin, robinetinidol-(4α → 8)-epigallocatechin, robinetinidol-(4β → 8)-epigallocatechin 3-O-gallate, robinetinidol-(4α → 8)-epigallocatechin 3-O-gallate, robinetinidol-(4α → 6)-gallocatechin and robinetinidol-(4α → 6)-epigallocatechin, in addition to the tentatively characterized, robinetinidol [4β → 6(8)]-gallocatechin and robinetinidol-(4α → 8)-gallocatechin.[2][3]

References

  1. ↑ Antioxidant activities of mangrove Rhizophora apiculata bark extracts, Afidah A. Rahima, Emmanuel Roccab, Jean Steinmetzb, M. Jain Kassima, M. Sani Ibrahima and Hasnah Osman, 2007
  2. ↑ Prorobinetinidins from Stryphnodendron adstringens. Palazzo de Mello J.; Petereit F.; Nahrstedt A., Phytochemistry, 1996.
  3. ↑ Influence of tannins from Stryphnodendron adstringens on growth and virulence factors of Candida albicans. Kelly Ishida, João Carlos Palazzo de Mello, Diógenes Aparício Garcia Cortez, Benedito Prado Dias Filho, Tânia Ueda-Nakamura and Celso Vataru Nakamura, Journal of antimicrobial chemotherapy, 2006 58(5):942-949


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