(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

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