N-(tert-butoxycarbonyl)-4-{1,3-bis(tert-butoxycarbonyl)-3-[2-(trimethylsilyl)ethoxymethyl]}amidino-L-phenylalanine, methyl ester

N1,N7-bis[N,N'-bis(tert-butoxycarbonyl)guanyl]-N4-[N-acetylhydrazide(2-aminoethyl)] diethylenetriamine

6-[(3-{[N,N'-bis[(1,1-dimethylethoxy)carbonyl]aminoiminomethyl]amino}pentyl)oxy]-3,4-dihydro-1-oxo-2(1H)-isoquinolineacetic acid 1,1-dimethylethyl ester

N-[8-(4-benzyloxyphenoxy)-1-octyl]-2-(N',N''-bis-tert-butoxycarbonylguanidino)-2-phenylacetamide