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Hexahydroxydiphenic acid

Names
Preferred IUPAC name 4,4′,5,5′,6,6′-Hexahydroxy-2,2′-dicarboxylic acid
Other names HHDP 3,4,5,3′,4′,5′-Hexahydroxydiphenate 3,4,5,3′,4′,5′-Hexahydroxydiphenic acid
Identifiers
CAS Number	128785-08-0
3D model (JSmol)	Interactive image
ChemSpider	8490515
PubChem CID	10315050
CompTox Dashboard (EPA)	DTXSID901029565
InChI InChI=1S/C14H10O10/c15-5-1-3(13(21)22)7(11(19)9(5)17)8-4(14(23)24)2-6(16)10(18)12(8)20/h1-2,15-20H,(H,21,22)(H,23,24)Key: MFTSECOLKFLUSD-UHFFFAOYSA-N InChI=1/C14H10O10/c15-5-1-3(13(21)22)7(11(19)9(5)17)8-4(14(23)24)2-6(16)10(18)12(8)20/h1-2,15-20H,(H,21,22)(H,23,24)Key: MFTSECOLKFLUSD-UHFFFAOYAZ
SMILES O=C(O)c2cc(O)c(O)c(O)c2c1c(O)c(O)c(O)cc1C(=O)O
Properties
Chemical formula	C14H10O10
Molar mass	338.224 g·mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). N verify (what is  ?) Infobox references

Hexahydroxydiphenic acid is an organic compound with the formula ₂. It is the oxidatively coupled derivative of gallic acid It is a white solid, although samples are typically brown owing to oxidation.

Occurrence

Luteic acid and ellagic acid are the mono- and dilactone of hexahydroxydiphenic acid, respectively. Hexahydroxydiphenic acid is a component of some ellagitannins, such as casuarictin.

See also

• Diphenic acid

References

1. "MetaCyc hexahydroxydiphenic acid". biocyc.org.
2. Haslam, E.; Cai, Y. (1994). "Plant polyphenols (vegetable tannins): Gallic acid metabolism". Natural Product Reports. 11 (1): 41–66. doi:10.1039/NP9941100041. PMID 15206456.
3. Feldman, Ken S.; Iyer, Malliga R.; Liu, Yanze (2003). "Ellagitannin Chemistry. Studies on the Stability and Reactivity of 2,4-HHDP-Containing Glucopyranose Systems". The Journal of Organic Chemistry. 68 (19): 7433–7438. doi:10.1021/jo034495x. PMID 12968897.

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