[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a monocarboxylic acid anion that is the conjugate base of pyrazine-2-carboxylic acid, obtained by deprotonation of the carboxy group. It is a conjugate base of a pyrazine-2-carboxylic acid."}, {"from": "gpt", "value": "[C][=C][N][=C][Branch1][Branch1][C][=N][Ring1][=Branch1][C][=Branch1][C][=O][O-1]"}]