Prodelphinidin is a name for the polymeric tannins composed of gallocatechin.Porter, 1992Prodelphinidin polymers: definition of structural units. Lai Yeap Foo and Lawrence J. Porter. J. Chem. Soc., Perkin Trans. 1, 1978, pp. 1186–1190, It yields delphinidin during depolymerisation under oxidative conditions.
Natural occurrences Prodelphinidins are one of the two sorts of tannins in grape (the other being procyanidins) being produced especially in the skin of the berry.Polymeric proanthocyanidins from grape skins. Jean-Marc Souquet, Véronique Cheynier, Franck Brossaud and Michel Moutounet, Phytochemistry, volume 43, Issue 2, September 1996, Pages 509–512,
Prodelphinidins can be found in Cistus salviifolius.Flavan-3-ols, prodelphinidins and further polyphenols from Cistus salvifolius. Andreas Danne, Frank Petereit and Adolf Nahrstedt, Phytochemistry, Volume 37, Issue 2, 1994, Pages 533–538, Gallocatechin-(4→8)-catechin (prodelphinidin B3), gallocatechin-(4→8)-gallocatechin and catechin-(4→8)-gallocatechin can be found in the pomegranate peels.Antioxidant properties of gallocatechin and prodelphinidins from pomegranate peel. Plumb G. W., de Pascual-Teresa S, Santos-Buelga C, Rivas-Gonzalo J. C and Williamson G, Redox Report, February 2002, Volume 7, Number 1, pages 41–46, Prodelphinidin B-2 3'-O-gallate can be found in green tea leaves and prodelphinidin B-2 3,3'-di-O-gallate can be found in Myrica rubra.
Particular oligomeric prodelphinidins Prodelphinidin B3 (gallocatechin-(4α→8)-catechin) and prodelphinidin B9 (epigallocatechin-(4α→8)-catechin) can be isolated in beer.Phenolic Compounds in Beer. Clarissa Gerhäuser and Hans Becker, Beer in Health and Disease Prevention, 2009 (article) Prodelphinidin C2 (gallocatechin-(4α→8)-gallocatechin-(4α→8)-catechin) can be isolated in malt.
The A-type proanthocyanidin epigallocatechin-(2β→7,4β→8)-epicatechin can be found in the leaves of Dioclea lasiophylla,
See also Crofelemer, a complex mixture of procyanidins and prodelphinidins from the latex of the South American tree Croton lechleri (locally called Sangre de Grado or Sangre de Drago)
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