N-[5-(adamantane-1-carbonylamino)pentyl]adamantane-1-carboxamide

1,7-bis-(4-methylphenyl)sulfonyl-1,7-diazacyclododecane

2-[[5-[(2-hydroxyphenyl)methylamino]pentylamino]methyl]phenol

1-methyl-3-[5-(methylcarbamoylamino)pentyl]urea

1-methyl-3-[5-[[methyl(nitroso)carbamoyl]amino]pentyl]-1-nitrosourea