The molecule is a tetrapeptide composed of L-alanine, L-phenylalanine, L-tryptophan, and L-asparagine joined in sequence by peptide linkages. It has a role as a metabolite. It derives from a L-alanine, a L-phenylalanine, a L-tryptophan and a L-asparagine.
(2S)-4-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-aminopropanoyl]amino]-3-phenylpropanoyl]amino]-3-(1H-indol-3-yl)propanoyl]amino]-4-oxobutanoic acid