C.I. Vat Black 32;N,N'-[[(7,14-Dihydro-7,14-dioxodibenzo[b,def]chrysene)-2,9-diyl]bis[imino(9,10-dihydro-9,10-dioxoanthracene)-4,1-diyl]]bisbenzamide;N,N'-[(7,14-dihydro-7,14-dioxodibenzo[b,def]chrysene-2,9-diyl)bis[imino(9,10-dihydro-9,10-dioxoanthracene-4,1-diyl)]]bis(benzamide)