Synonyms: Biphenyl,4,4'-diisocyanato-3,3'-dimethoxy- (5CI); Isocyanic acid,3,3'-dimethoxy-4,4'-biphenylylene ester (7CI,8CI);3,3'-Dimethoxy-4,4'-biphenylene diisocyanate; 3,3'-Dimethoxy-4,4'-biphenylylenediisocyanate; 3,3'-Dimethoxy-4,4'-biphenylylene isocyanate;3,3'-Dimethoxydiphenyl-4,4'-diisocyanate;4,4'-Diisocyanato-3,3'-dimethoxy-1,1'-biphenyl; 4,4'-Diisocyanato-3,3'-dimethoxybiphenyl;4,4'-Diisocyanato-3,3'-methoxybiphenyl; NSC 5040