[{"from": "human", "value": "Provide a brief overview of this molecule. [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]"}, {"from": "gpt", "value": "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."}]