[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a pyridinium ion."}, {"from": "gpt", "value": "[C][=C][C][=N+1][Branch1][S][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][C][C][C][C][C][C][=O][C][C][C][C][C][C][=O]"}]