CAS No 80316-29-6 , 1,4-Benzenediamine,N-[4-[[4-[[4-[(4-aminophenyl)imino]-2,5-cyclohexadien-1-ylidene]amino]phenyl]imino]-2,5-cyclohexadien-1-ylidene]-N'-[4-[[4-[(4-imino-2,5-cyclohexadien-1-ylidene)amino]phenyl]imino]-2,5-cyclohexadien-1-ylidene]-(9CI)