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