The molecule is a six amino acid oligopeptide fragment of the human milk protein, beta-casein. It has a role as a human metabolite. It is a conjugate acid of a neocasomorphin(1-).
(2S,3S)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-amino-3-(4-hydroxyphenyl)propanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-4-carboxybutanoyl]pyrrolidine-2-carbonyl]amino]-3-methylpentanoic acid