[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a carboxypyridinecarboxylate. It is a conjugate base of a dinicotinic acid. It is a conjugate acid of a dinicotinate(2-)."}, {"from": "gpt", "value": "[C][=C][Branch1][N][C][=N][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O]"}]