[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the 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 is functionally related to a L-alanine, a L-methionine, a L-serine and a L-arginine."}, {"from": "gpt", "value": "[C][C@@H1][Branch2][Ring2][=N][C][=Branch1][C][=O][N][C@@H1][Branch1][Branch1][C][C][S][C][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][O][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][C][N][=C][Branch1][C][N][N][C][=Branch1][C][=O][O][N]"}]