3-((S)-3-{(S)-2-[(S)-2-((2S,3S)-2-Amino-3-methyl-pentanoylamino)-4-carbamoyl-butyrylamino]-3-carbamoyl-propionylamino}-4-{(R)-2-[(S)-1-(carbamoylmethyl-carbamoyl)-3-methyl-butylcarbamoyl]-pyrrolidin-1-yl}-4-oxo-butylsulfanyl)-propionic acid 、
o-nitrobenzenesulfenyl-p-nitrophenylalanine 、
2,4,5-三氯苯酚 在
N,N'-二环己基碳二亚胺 作用下,
生成
o-nitrobenzenesulfenyl-p-nitrophenylalanyl-isoleucyl-glutaminyl-asparaginyl-S-(β-carboxyethyl)homocysteinyl-prolyl-leucyl-glycine amide