Hexahydroxydiphenic acid

Hexahydroxydiphenic acid
Names
	Preferred IUPAC name 4,4',5,5',6,6'-Hexahydroxy[1,1'-biphenyl]-2,2'-dicarboxylic acid
	Other names HHDP; 3,4,5,3',4',5'-Hexahydroxydiphenate; 3,4,5,3',4',5'-Hexahydroxydiphenic acid
Identifiers
3D model (JSmol)	Interactive image;
ChemSpider	8490515 ;
PubChem CID	10315050;
	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−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Hexahydroxydiphenic acid is an organic compound with the formula [(HO)₃C₆HCO₂H]₂. It is the oxidatively coupled derivative of gallic acid[1] It is a white solid, although samples are typically brown owing to oxidation.

Ellagic acid.

Hexahydroxydiphenic acid is a component of some ellagitannins,[2] such as casuarictin. Luteic acid is the monolactone and ellagic acid is the dilactone of hexahydroxydiphenic acid.

References

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.
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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[Haslam_and_Cai-1] 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.

[2] 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.