[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the arenesulfonic acid that is toluene-2-sulfonic acid bearing a nitro substituent at C-4. It is an arenesulfonic acid and a C-nitro compound."}, {"from": "gpt", "value": "[C][C][=C][Branch1][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N+1][=Branch1][C][=O][O-1][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]