[{"from": "human", "value": "Create a molecule with the structure as the one described. 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 is functionally related to a L-alanine, a L-leucine, a L-valine and a L-serine."}, {"from": "gpt", "value": "[C][C@@H1][Branch2][Ring2][O][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch1][C][Branch1][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][O][C][=Branch1][C][=O][O][N]"}]