Nδ-[5'-(N6-benzyladenosyl)]-Nδ-(2-iodoethyl)-(S)-2,5-diaminopentanoic acid hydrochloride

tert-butyl (2S)-[bis(tert-butoxycarbonyl)amino]-(6Z)-[(benzyloxycarbonyl)amino]-7-(methoxycarbonyl)hept-5-enoate

(S)-(-)-tert-butyl-6-bromo-2-[bis-(tert-butoxycarbonyl)amino]-5-oxohexanoate