The molecule is a tetrapeptide composed of L-alanine, L-leucine, L-threonine, and L-proline units joined in sequence. It has a role as a metabolite. It derives from a L-alanine, a L-leucine, a L-threonine and a L-proline.
(2S)-1-[(2S,3R)-2-[[(2S)-2-[[(2S)-2-aminopropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxybutanoyl]pyrrolidine-2-carboxylic acid