[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a 4-hydroxy-4-methylglutamic acid that has L-configuration. It has a role as a metabolite. It is a 4-hydroxy-4-methylglutamic acid, a L-glutamic acid derivative and a non-proteinogenic L-alpha-amino acid."}, {"from": "gpt", "value": "[C][C][Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}]