The molecule is an oligopeptide composed of L-alanine, L-arginine, glycine, L-tyrosine, L-serine, L-serine, L-phenylalanine, L-isoleucine, L-tyrosine, L-trytophan, L-phenylalanine, L-phenylalanine, L-aspartic acid and L-phenylalanine joined in sequence by peptide linkages.
(3S)-3-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[2-[[(2S)-2-[[(2S)-2-aminopropanoyl]amino]-5-carbamimidamidopentanoyl]amino]acetyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-hydroxypropanoyl]amino]-3-hydroxypropanoyl]amino]-3-phenylpropanoyl]amino]-3-methylpentanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-(1H-indol-3-yl)propanoyl]amino]-3-phenylpropanoyl]amino]-3-phenylpropanoyl]amino]-4-[[(1S)-1-carboxy-2-phenylethyl]amino]-4-oxobutanoic acid