[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an arenesulfonic acid. It is a conjugate acid of a 4-formylbenzenesulfonate."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][Branch2][=C][C][=C][Ring1][=Branch1][C][=O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]