Noun
hexahydroxydiphenic acid (uncountable)
English Wikipedia has an article on:hexahydroxydiphenic acidWikipedia
(organic chemistry) A component of some ellagitannins, such as casuarictin; it has the formula [(HO)3C6HCO2H]2.
Luteic acid is the lactone and ellagic acid is the dilactone of hexahydroxydiphenic acid.