[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an erythro-3-methylmalic acid. It is a conjugate acid of a D-erythro-3-methylmalate(2-). It is an enantiomer of a L-erythro-3-methylmalic acid."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][O][C][=Branch1][C][=O][O]"}]