N,N′-Bis(4-methyl-2-pyridinyl)urea

N,N'-BIS(5-CHLORO-2-METHYLPHENYL)ISOPHTHALAMIDE

N,N'-BIS(CARBOBENZYLOXY)-L-LYSYL-L-TYROSINE METHYL ESTER

N,N'-BIS(CINNAMYLIDENE)-1,4-PHENYLENEDIAMINE

N,N'-DI-P-TOSYL-L-CYSTINE

N,N'-DIACETYL-2-NITRO-P-PHENYLENEDIAMINE

N,N'-DIBENZYLIDENE-9H-CARBAZOLE-3,6-DIAMINE

N,N'-dicyclohexylsulfamide

N,N'-DIETHYL-N,N'-DIPHENYL-ISOPHTHALAMIDE

N,N'-TEREPHTHALYLIDENEBIS(2-HYDROXY-5-NITROANILINE)

N,N'-TEREPHTHALYLIDENEBIS(4-BROMO-2-CHLOROANILINE)

N,N'-TEREPHTHALYLIDENEDIANTHRANILIC ACID

N,N-BIS-(2-BENZOYLETHYL)-METHYLAMINE

N,2-DIMETHYL-1-NAPHTHAMIDE

N,2,3,3-tetramethyl-4-phenyl-2-butanamine hydrochloride