N2N3-bis(tert-butoxycarbonyl)-N1-(5-[(methanesulfonyl)oxy]pentyl)guanidine

2-{3-[N-(tert-butoxycarbonyl)-N-[(tert-butoxycarbonylimino)(methylthio)methyl]amino]propyl}-1-trifluoroacetyl-1,2,3,4-tetrahydroquinoline

2,2,2-trichloroethyl 2-{3-[N-(tert-butoxycarbonyl)-N-[(tert-butoxycarbonylimino)(methylthio)methyl]amino]propyl}-1,2,3,4-tetrahydroquinoline-1-carboxylate

12-((4-(2,3-bis(tert-butoxycarbonyl)guanidino)-3'-((5-(N-(tert-butoxycarbonyl)carbamimidoyl)-2-(methylthio)thiophen-3-yl)sulfonyl)-6-methyl-[1,1'-biphenyl]-2-yl)amino)-12-oxododecanoic acid