[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a 4-hydroxy-4-methyl-L-glutamic acid that has S-configuration. It is a conjugate acid of a (2S,4S)-4-hydroxy-4-methylglutamate(1-)."}, {"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]"}]