N,N′-Bis(4-fluorophenyl)thiourea

N,N′-Bis(4,6-dimethyl-2-pyridinyl)thiourea

N,N'-BIS(CARBOBENZYLOXY)-L-LYSYL-L-ISOLEUCINAMIDE

N,N'-BIS(CARBOBENZYLOXY)LYSYLSERINE METHYL ESTER

N,N'-DI-1-NAPHTHYLFORMAMIDINE

N,N'-DI(4-THIOMORPHOLINYL)UREA

N,N'-DIBENZYL-N,N'-DIISOPROPYLMALONAMIDE

N,N'-DICARBOBENZYLOXY-L-ORNITHINE

N,N'-DIETHYL-N,N'-DI(M-TOLYL)ISOPHTHALAMIDE

N,N'-DIISOPROPYL-N,N'-DI(O-TOLYL)OXAMIDE

N,N'-TEREPHTHALYLIDENEBIS(3-FLUOROANILINE)

N,N'-TEREPHTHALYLIDENEDI-P-ANISIDINE

N,N-(2-HYDROXYETHYL)FORMAMIDE

N,N-BIS(2-(N-DODECYLCARBAMOYLOXY)ETHYL)-2-(4-CHLOROPHENOXY)ACETAMIDE

N,2-Dimethyl-4-nitroaniline