[{"from": "human", "value": "Could you give me a brief overview of 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 dicarboxylic acid comprising 2-hydroxy-2H-pyran having two carboxy groups located at the 4- and 6-positions. It is a dicarboxylic acid, a member of pyrans and a lactol. It is a conjugate acid of a 4-carboxy-2-hydroxymuconate semialdehyde hemiacetal(2-)."}]