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

N,N'-BIS(PHENOXYCARBONYL)-4-METHYL-1,3-PHENYLENEDIAMINE

N,N'-DI(1-NAPHTHYL)UREA

N,N'-DIBENZYL-N,N'-DIMETHYLOXAMIDE

N,N'-dicyclohexylsulfamide

N,N'-DIFORMYL-L-CYSTINE

N,N'-TEREPHTHALYLIDENEBIS(3-FLUOROANILINE)

N,N'-TEREPHTHALYLIDENEDIANILINE

N,N-BIS-(2-CYANO-ETHYL)-BENZENESULFONAMIDE

N,2-DIMETHYL-1,3-BENZODIOXOLE-2-METHANAMINE HYDROBROMIDE

N,3,4,4-tetramethyl-N-phenyl-1-imidazolidinecarboxamide hydrochloride

N,N′-(1,2,5-Oxadiazole-3,4-diyl)bis(2-chloroacetamide)

N,N'-(1,4-PHENYLENEDIMETHYLIDYNE)BIS(2-AMINOPYRIDINE)

N,N'-(1,4-PHENYLENEDIMETHYLIDYNE)BIS(3-CHLORO-O-ANISIDINE)

N,N-Dibutyl-3-nitrobenzenesulfonamide