Wiktionary
hexaphenylbenzene
n. (context organic compound English) An aromatic hydrocarbon in which every hydrogen atom of a benzene ring has been replaced by phenyl groups
Wikipedia
Hexaphenylbenzene
Hexaphenylbenzene is an aromatic compound composed of a benzene ring substituted with six phenyl rings.
It may be prepared through a Diels-Alder reaction by refluxing tetraphenylcyclopentadienone and diphenylacetylene in benzophenone or other high-temperature solvent.