N,N'-(methanediyl-di-4,4'-phenyl)-di(carbamic acid(4-tert-amylphenyl) ester)

N,N'-(methanediyl-di-4,4'-phenyl)-bis(carbamic acid(2-phenylphenyl) ester)

4,4'-methylenebis(4,1-phenylene)di(carbamic acid(4-(1,1,3,3-tetramethylbutyl)phenyl)ester)

N,N'-(4,4'-methanediyl-diphenyl)-di(carbamic acid (3,5-dimethoxyphenyl) ester)

N,N'-(4,4'-methanediyl-diphenyl)-di(carbamic acid (1-napthyl) ester)