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Prodelphinidin is a name for the polymeric tannins composed of
Prodelphinidin is a name for the polymeric tannins composed of gallocatechin
Gallocatechol or gallocatechin (GC) is a flavan-3-ol, a type of chemical compound including catechin, with the gallate residue being in an Cis-trans isomerism, isomeric ''trans'' position.
This compound possesses two epimers. The most common, (+) ...
. It yields delphinidin during depolymerisation under oxidative conditions.
Natural occurrences
Prodelphinidins are one of the two sorts of tannins ingrape
A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus ''Vitis''. Grapes are a non- climacteric type of fruit, generally occurring in clusters.
The cultivation of grapes began approximately 8,0 ...
(the other being procyanidins) being produced especially in the skin of the berry.
Prodelphinidins can be found in '' Cistus salviifolius''. Gallocatechin-(4→8)-catechin ( prodelphinidin B3), gallocatechin-(4→8)-gallocatechin and catechin-(4→8)-gallocatechin can be found in the pomegranate
The pomegranate (''Punica granatum'') is a fruit-bearing deciduous shrub in the family Lythraceae, subfamily Punica, Punicoideae, that grows between tall. Rich in symbolic and mythological associations in many cultures, it is thought to have o ...
peels. Prodelphinidin B-2 3'-O-gallate can be found in green tea
Green tea is a type of tea made from the leaves and buds of the '' Camellia sinensis'' that have not undergone the withering and oxidation process that creates oolong teas and black teas. Green tea originated in China in the late 1st millenn ...
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 inbeer
Beer is an alcoholic beverage produced by the brewing and fermentation of starches from cereal grain—most commonly malted barley, although wheat, maize (corn), rice, and oats are also used. The grain is mashed to convert starch in the ...
. Prodelphinidin C2 (gallocatechin-(4α→8)-gallocatechin-(4α→8)-catechin) can be isolated in malt
Malt is any cereal grain that has been made to germinate by soaking in water and then stopped from germinating further by drying with hot air, a process known as "malting".
Malted grain is used to make beer, whisky, malted milk, malt vinegar, ...
.
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)References
{{Condensed tannin Condensed tannins Grape