[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][#Branch1][#Branch1][#C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained by the deprotonation of both the carboxy groups of acetylenedicarboxylic acid. It is a C4-dicarboxylate and a dicarboxylic acid dianion. It is a conjugate base of an acetylenedicarboxylate(1-)."}]