2,2'-Iminostilbene 2,3,6,7-Dibenzazepine 256-96-2 5-Azadibenzo[a,e]cycloheptatriene 5H-Dibenz[b,f]azepine 5H-Dibenzo[b,f]azepine Dibenz[b,f]azepine Iminostilbene NSC123458 Stilbene, 2,2'-imino-