N,N'-BIS-(4-NITRO-BENZYLIDENE)-BENZENE-1,4-DIAMINE

N,N'-BIS-(2-CHLORO-PHENYL)-ISOPHTHALAMIDE

N,N'-BIS(2-PHENYLETHYL)OXAMIDE

N,N'-BIS(2,5-DICHLOROPHENYL)TEREPHTHALAMIDE

N,N'-BIS(3-NITROBENZYLIDENE)-1,4-PHENYLENEDIAMINE

N,N'-BIS(4-(METHYLTHIO)PHENYL)TEREPHTHALAMIDE

N,N'-BIS(2-DIMETHYLAMINOETHOXYCARBONYL)-4-METHYL-1,3-PHENYLENEDIAMINE

N,N'-BIS(4-CHLORO-2-METHYLPHENYL)FORMAMIDINE

N,N′-Bis(4-ethoxyphenyl)urea

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