The molecule is a tetrapeptide composed of L-aspartic acid, L-proline and two L-serine units joined by peptide linkages. It has a role as a metabolite. It derives from a L-aspartic acid, a L-proline and a L-serine.
(3S)-3-amino-4-[(2S)-2-[[(2S)-1-[[(1S)-1-carboxy-2-hydroxyethyl]amino]-3-hydroxy-1-oxopropan-2-yl]carbamoyl]pyrrolidin-1-yl]-4-oxobutanoic acid