6-[5-(N-tert-Butoxycarbonyl-N-phenylmethylamino)-pentylamino]-hexan-1ol

[5-(Benzyl-tert-butoxycarbonyl-amino)-pentyl]-(6-hydroxy-hexyl)-carbamic acid tert-butyl ester

N-(N'-benzyl-N'-tert-butoxycarbonyl-5-aminopentyl)-N-tert-butoxycarbonyl-6-aminopentanoyl-1-toluene-4-sulfonic acid

tert-butyl N-benzyl-5-(dimethylphenylsilyl)-5-oxopentylcarbamate