67892-90-4 Bisphenol A, 4,4'-diphenylmethanebismaleimide, cyanogen chloride polymer Cyanogen chloride ((CN)Cl), polymer with 1,1'-(methylenedi-4,1-phenylene)bis(1H-pyrrole-2,5-dione) and 4,4'-(1-methylethylidene)bis(phenol)