Wiktionary
hexahydroxydiphenic acid
n. (context organic compound English) A component of some ellagitannins, such as casuarictin.
Wikipedia
Hexahydroxydiphenic acid
Hexahydroxydiphenic acid is a component of some ellagitannins such as casuarictin. Luteic acid is the lactone and ellagic acid is the di lactone of hexahydroxydiphenic acid.