[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][Branch1][#C][C][=C][Branch1][=Branch1][O][C][Ring1][=Branch1][=O][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a pyrandicarboxylic acid. It is a conjugate acid of a 2-oxo-2H-pyran-4,6-dicarboxylate."}]