CAS No 53-73-6 , 2-[[1-[2-[[2-[[2-[[2-[[5-(diaminomethylideneamino)-2-[(2,
4-diamino-4-oxobutanoyl)amino]pentanoyl]amino]-3-methylbutanoyl]amino]-
3-(4-hydroxyphenyl)propanoyl]amino]-3-methylbutanoyl]amino]-3-(1H-
imidazol-5-yl)propanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanoic
acid