[{"from": "human", "value": "Describe this molecule. [C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}, {"from": "gpt", "value": "The molecule is a citrate(2-) that is the dianion obtained by the deprotonation of the terminal carboxy groups of citric acid. It is a conjugate base of a 3,4-dicarboxy-3-hydroxybutanoate. It is a tautomer of a 2-(carboxymethyl)-2-hydroxysuccinate."}]