Synonyms: Urea,1,1'-(methylenedi-p-phenylene)bis[3,3-dimethyl- (7CI,8CI);4,4'-Bis(N,N-dimethylureido)diphenylmethane;4,4'-Methylenebis(phenyldimethylurea);4,4'-Methylenediphenylenebis(dimethylurea);Bis[4-(N,N-dimethylureido)phenyl]methane;Bis[4-(dimethylaminocarbonylamino)phenyl]methane;Bis[p-(N,N-dimethylurea)phenyl]methane;NSC 202633;Omicure 52;Omicure U 52;