[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an erythro-3-methylmalic acid. It is an enantiomer of a D-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]"}]