N,N'-BIS(2-ETHYL-6-METHYLPHENYL)UREA

N,N'-BIS(2-THENYLIDENE)ETHYLENEDIAMINE

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

N,N'-BIS(4-ETHOXYPHENYL)ISOPHTHALAMIDE

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

N,N'-BIS(4,5-DICHLORO-2-METHYLPHENYL)ISOPHTHALAMIDE

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

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

N,N'-DI-P-TOLYL-3,6-BIS-P-TOLYLIMINO-CYCLOHEXA-1,4-DIENE-1,4-DIAMINE

N,N'-DITETRADECYLOXAMIDE

N,N'-DODECAMETHYLENEBIS(HEXAHYDROPHTHALAMIC ACID)

N,N'-HEXAMETHYLENEBIS(1-PIPERIDINECARBOXAMIDE)

N,N'-HEXAMETHYLENEBIS(BUTYL CARBAMATE)

N,N'-TEREPHTHALYLIDENEBIS(2-AMINOPHENOL)

N,N-BIS(2-HYDROXYETHYL)-N'-(4,5-DICHLORO-2-NITROPHENYL)ETHYLENEDIAMINE