[{"from": "human", "value": "Provide a description of this molecule. [C][C@][Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}, {"from": "gpt", "value": "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-)."}]