[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a pyridinium ion consisting of nicotinic acid having a methyl substituent on the pyridine nitrogen. It has a role as a plant metabolite. It is functionally related to a nicotinic acid. It is a conjugate acid of a N-methylnicotinate."}, {"from": "gpt", "value": "[C][N+1][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch1][C][=O][O]"}]