(S)-1-tert-butyl-[bis(2-tert-butoxycarbonyl)amino]-7-oxoheptanoate

tert-butyl (2S)-[bis(tert-butoxycarbonyl)amino]-(6R)-[(benzyloxycarbonyl)amino]-7-(methoxycarbonyl)heptanoate

N,N'-(9,9'-spirobi[fluorene]-2,2'-diylbis(methylene))bis(6-(tert-butyl)-8-nitro-4-oxo-4H-chromene-2-carboxamide)

(S)-1-tert-butyl 2-[bis-(tert-butoxycarbonyl)amino]-5-oxopentanoate

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