1,1-dibutyl-3-[6-(3,3-dibutylureido)hexyl]urea

N,N'-hexanediyl-bis-carbamic acid bis(3-methylbutyl) ester

methyl N-[6-(methoxycarbonylamino)hexyl]carbamate

N,N'-hexanediyldicarbamic acid di(4-(1,1,3,3-tetramethylbutyl)phenyl) ester

N,N'-hexanediyl-bis-carbamic acid di(2-phenylphenyl) ester