[{"from": "human", "value": "Describe this molecule. [C][C][C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is dicarboxylate anion of 3-ethylmalic acid. It is a conjugate base of a 3-ethylmalic acid."}]