[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a glutamic acid derivative with a methylsulfanyl group at position 4. It has a role as a metabolite. It is a glutamic acid derivative, a sulfur-containing amino acid, a non-proteinogenic alpha-amino acid and a methyl sulfide."}, {"from": "gpt", "value": "[C][S][C][Branch1][O][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][O]"}]