Boc-Tyr-Ψ[CO-O]-Leu-OH

benzyl (2S)-2-[(2R)-3-[(2R)-2-tert-butoxycarbonylamino-3-(3-chloro-4-methoxyphenyl) propionylamino]-2-methylpropionyloxy]-4-methylpentanoate

(R)-2-[(2S,3S)-2-((S)-sec-Butyl)-1-(tert-butyl-dimethyl-silanyl)-4-oxo-azetidin-3-yloxy]-4-methyl-pentanoic acid benzyl ester

(2S,3R)-1,3-bis(benzyloxy)-1-oxobutan-2-yl ((S)-4-methyl-2-((N2,Nw,Nw'-tris(tert-butoxycarbonyl)-L-arginyl-L-tyrosyl)oxy)pentanoyl)-L-prolinate

benzyl O-benzyl-N-(((S)-4-methyl-2-((N2,Nw,Nw'-tris(tert-butoxycarbonyl)-L-arginyl-L-tyrosyl)oxy)pentanoyl)-L-prolyl)-L-threoninate