Boc-Paa-Paa-Lys(Boc)-OMe

(S)-2-{Bis-[(E)-3-(3-phenoxy-phenyl)-allyl]-amino}-6-ureido-hexanoic acid methyl ester

Psoc-Lys(Boc)-OMe

tert-butyl N-[(5S)-5-[[(2S)-2,6-bis(tert-butoxycarbonylamino)hexanoyl]amino]-6-oxo-6-[4-[2-(2,3,5,6-tetrafluoro-4-pyridyl)ethynyl]anilino]hexyl]carbamate

tert-butyl N-[(5S)-5-[[(2S)-2,6-bis(tert-butoxycarbonylamino)hexanoyl]amino]-6-[3,4-bis[2-(2,3,5,6-tetrafluoro-4-pyridyl)ethynyl]anilino]-6-oxo-hexyl]carbamate