Gallocatechol or gallocatechin (GC) is a
flavan-3-ol
Flavan-3-ols (sometimes referred to as flavanols) are a subgroup of flavonoids. They are derivatives of flavans that possess a 2-phenyl-3,4-dihydro-2''H''-chromen-3-ol skeleton. Flavan-3-ols are structurally diverse and include a range of compo ...
, a type of chemical compound including
catechin
Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids.
The name of the catechin chemical family derives from ''catechu'', which is the tannic ...
, with the gallate residue being in an
isomeric trans position.
This compound possesses two
epimer
In stereochemistry, an epimer is one of a pair of diastereomers. The two epimers have opposite configuration at only one stereogenic center out of at least two. All other stereogenic centers in the molecules are the same in each. Epimerization is ...
s. The most common, (+)-gallocatechin (GC), CAS number 970-73-0, is found notably 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 the ...
. The other enantiomer is called (-)-gallocatechin or ''ent''-gallocatechin. It was first isolated from green tea by
Michiyo Tsujimura in 1934.
Epigallocatechin
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 ...
is another type of catechin, with the gallate residue being in an
isomeric cis position. It can be found in
St John's wort
''Hypericum perforatum'', known as St. John's wort, is a flowering plant in the family Hypericaceae and the type species of the genus ''Hypericum''.
Possibly a hybrid between '' H. maculatum'' and '' H. attenuatum'', the species can be found a ...
.
See also
*
Epigallocatechin gallate
Epigallocatechin gallate (EGCG), also known as epigallocatechin-3-gallate, is the ester of epigallocatechin and gallic acid, and is a type of catechin.
EGCG – the most abundant catechin in tea – is a polyphenol under basic research for its ...
*
Prodelphinidin
Prodelphinidin is a name for the polymeric tannins composed of gallocatechin. It yields delphinidin during depolymerisation under oxidative conditions.
Natural occurrences
Prodelphinidins are one of the two sorts of tannins in grape (the other ...
*
List of phytochemicals in food
While there is ample evidence to indicate the health benefits of diets rich in fruits, vegetables, legumes, whole grains and nuts, no specific food has been acknowledged by scientists and government regulatory authorities as providing a health bene ...
References
External links
Epigallocatechin on the Sigma-Aldrich websiteGallocatechin on the Sigma-Aldrich website
{{GHBergics
Flavanols
CB1 receptor agonists
GABAA receptor positive allosteric modulators
GHB receptor agonists