SMILES: C[C@@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CO)C(=O)O)N
Description: The molecule is a tetrapeptide composed of L-alanine, L-leucine, L-valine, and L-serine joined in sequence by peptide linkages. It has a role as a metabolite. It derives from a L-alanine, a L-leucine, a L-valine and a L-serine.