[{"from": "human", "value": "Could you provide a description of this molecule? [C][#Branch1][#Branch1][#C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid monoanion that is the conjugate base of butynedioic acid. It is a conjugate base of a butynedioic acid. It is a conjugate acid of an acetylenedicarboxylate(2-)."}]