The molecule is a 30-membered homodetic cyclic peptide comprising the sequence D-Phe-His-Leu-Leu-Arg-Glu-Val-Leu-Glu-Nle-Ala-Arg-Ala-Glu-Gln-Leu-Ala-Gln-Glu-Ala-His-Lys-Asn-Arg-Lys-Leu-Nle-Glu-Ile-Ile-NH2 cyclised by an amide bridge, formed by condensation of the side-chain carboxy group of the Glu residue at position 19 and the side-chain amino group of the Lys residue at position 22. It has a role as a corticotropin-releasing factor receptor antagonist and a neuroprotective agent. It is a homodetic cyclic peptide and a polypeptide.
(4S)-5-[[(2S)-5-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-5-amino-1-[[(3S,6S,9S,18S)-18-[[(2S)-4-amino-1-[[(2S)-1-[[(2S)-6-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S,3S)-1-[[(2S,3S)-1-amino-3-methyl-1-oxopentan-2-yl]amino]-3-methyl-1-oxopentan-2-yl]amino]-4-carboxy-1-oxobutan-2-yl]amino]-1-oxohexan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1-oxohexan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-1,4-dioxobutan-2-yl]carbamoyl]-3-(1H-imidazol-4-ylmethyl)-6-methyl-2,5,8,12-tetraoxo-1,4,7,13-tetrazacyclooctadec-9-yl]amino]-1,5-dioxopentan-2-yl]amino]-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1,5-dioxopentan-2-yl]amino]-4-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-amino-3-phenylpropanoyl]amino]-3-(1H-imidazol-4-yl)propanoyl]amino]-4-methylpentanoyl]amino]-4-methylpentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-4-carboxybutanoyl]amino]-3-methylbutanoyl]amino]-4-methylpentanoyl]amino]-4-carboxybutanoyl]amino]hexanoyl]amino]propanoyl]amino]-5-carbamimidamidopentanoyl]amino]propanoyl]amino]-5-oxopentanoic acid