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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 isomeric trans position.
This compound possesses two epimers. The most common, (+)-gallocatechin (GC), CAS ...
. 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 (botany), berry, of the deciduous woody vines of the flowering plant genus ''Vitis''. Grapes are a non-Climacteric (botany), climacteric type of fruit, generally occurring in clusters.
The cultivation of ...
(the other being procyanidins) being produced especially in the skin of the berry.
Prodelphinidins can be found in ''Cistus salviifolius
''Cistus salviifolius'', common names sage-leaved rock-rose, salvia cistus or Gallipoli rose, is a shrub of the family Cistaceae.
Etymology
The genus name ''Cistus'' derives from the Ancient Greek words ''κίσθος'' (''kisthos'') meaning bas ...
''. Gallocatechin-(4→8)-catechin (prodelphinidin B3
Prodelphinidin B3 is a prodelphinidin dimer found in food products such as barley and beer, in fruits and pod vegetable
Pod vegetables are a type of fruit vegetables where pods are often eaten when they are still green.
Such plants as green be ...
), gallocatechin-(4→8)-gallocatechin and catechin-(4→8)-gallocatechin can be found in the pomegranate peels. Prodelphinidin B-2 3'-O-gallate can be found in green tea
Green tea is a type of tea that is made from '' Camellia sinensis'' leaves and buds that have not undergone the same withering and oxidation process which is used to make oolong teas and black teas. Green tea originated in China, and since ...
leaves and prodelphinidin B-2 3,3'-di-O-gallate can be found in '' Myrica rubra''.
Particular oligomeric prodelphinidins
Prodelphinidin B3
Prodelphinidin B3 is a prodelphinidin dimer found in food products such as barley and beer, in fruits and pod vegetable
Pod vegetables are a type of fruit vegetables where pods are often eaten when they are still green.
Such plants as green be ...
(gallocatechin-(4α→8)-catechin) and prodelphinidin B9 (epigallocatechin-(4α→8)-catechin) can be isolated in beer
Beer is one of the oldest and the most widely consumed type of alcoholic drink in the world, and the third most popular drink overall after water and tea. It is produced by the brewing and fermentation of starches, mainly derived from cer ...
. Prodelphinidin C2 (gallocatechin-(4α→8)-gallocatechin-(4α→8)-catechin) can be isolated in malt
Malt is germinated cereal grain that has been dried in a process known as " malting". The grain is made to germinate by soaking in water and is then halted from germinating further by drying with hot air.
Malted grain is used to make beer, ...
.
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