[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is tricarboxylate anion of (carboxymethoxy)succinic acid; major species at pH 7.3. It is a conjugate base of a (carboxymethoxy)succinic acid."}, {"from": "gpt", "value": "[C][Branch1][S][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]