[{"from": "human", "value": "Describe this molecule. [C][=C][N][=C][Branch1][#Branch2][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a pyridinedicarboxylic acid carrying carboxy groups at positions 2 and 4. It is a conjugate acid of a lutidinate(1-)."}]