[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an arenesulfonate oxoanion obtained by deprotonation of the sulfo group of 4-hydroxy-3-methoxybenzene-1-sulfonic acid. It is a conjugate base of a 4-hydroxy-3-methoxybenzene-1-sulfonic acid."}, {"from": "gpt", "value": "[C][O][C][=C][Branch1][P][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O-1][O]"}]