Hexahydroxydiphenic acid is an organic compound with the formula
HO)3C6HCO2Hsub>2. It is the oxidatively coupled derivative of
gallic acid
Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6 H2( OH)3CO2H. It is classified as a phenolic acid. It is found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plant ...
It is a white solid, although samples are typically brown owing to oxidation.
Occurrence
left, 142px, Ellagic acid.
Luteic acid and
ellagic acid
Ellagic acid is a polyphenol found in numerous fruits and vegetables. It is the dilactone of hexahydroxydiphenic acid.
Name
The name comes from the French term ''acide ellagique'', from the word ''galle'' spelled backward because it can be o ...
are the mono- and di
lactone of hexahydroxydiphenic acid, respectively. Hexahydroxydiphenic acid is a component of some
ellagitannin
image:Castalagin.svg, 130px, Castalagin is a representative ellagitannin, characterized by coupled gallic acid substituents
The ellagitannins are a diverse class of hydrolyzable tannins, a type of polyphenol formed primarily from the oxidative link ...
s,
such as
casuarictin.
See also
*
Diphenic acid
References
Ellagitannins
Pyrogallols
Biphenyls
Trihydroxybenzoic acids
{{phenol-stub