Synonyms: N,N'-Diphenyl-1,4-benzoquinonediimine;N,N'-(2,5-Cyclohexadiene-1,4-diylidene)bis(benzenamine);N,N'-(2,5-Cyclohexadiene-1,4-diylidene)dianiline;N,N'-[2,5-Cyclohexadiene-1,4-diylidene]bis(benzenamine);N,N'-Diphenyl-1,4-benzenediimine;N,N'-Diphenyl-p-benzoquinone diimine;p-Benzoquinonedianil