CAS No 131602-53-4 , 2-[[2-[[2-[[2-[[2-[2-[[2-[[6-amino-2-[[4-amino-2-[[2-[(2-aminoacetyl)
amino]-3-hydroxypropanoyl]amino]-4-oxobutanoyl]amino]hexanoyl]amino]
acetyl]amino]propanoylamino]-3-methylpentanoyl]amino]-3-methylpentanoyl]
amino]acetyl]amino]-4-methylpentanoyl]amino]-4-methylsulfanylbutanoic
acid