N,N'-BIS-(3,5-DIMETHYL-PHENYL)-ISOPHTHALAMIDE

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

N,N'-BIS-(2-HYDROXY-1-PHENYL-ETHYL)-2,2-DIMETHYL-MALONAMIDE

N,N'-bis(2,4-dimethylphenyl)thiourea

N,N'-BIS(3-METHOXYPHENYL)TEREPHTHALAMIDE

N,N'-BIS(4-ANILINOPHENYL)-1,4-DIAZABUTADIENE

N,N'-BIS(2-HYDROXY-ALPHA-METHYL-BENZYLIDENE)ETHYLENE DIAMINE

N,N'-BIS(4-ETHOXYPHENYL)-1,10-DECANEDIAMIDE

N,N′-Bis(4-methyl-2-pyridinyl)urea

N,N'-BIS(ALPHA-CYANO-4-DIMETHYLAMINOBENZYL)ETHYLENEDIAMINE

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

N,N'-DI-O-TOLYL-TEREPHTHALAMIDE

N,N'-DIALLYL-3,5-PYRIDINEDICARBOXAMIDE

N,N'-DICARBOBENZYLOXY-L-CYSTINE

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