[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a sulfur oxoanion. It is a conjugate base of a dithionous acid. It is a conjugate acid of a dithionite(2-)."}, {"from": "gpt", "value": "[O][S][=Branch1][C][=O][S][=Branch1][C][=O][O-1]"}]