[{"from": "human", "value": "Generate a molecule based on this description. The molecule appears as an odorless yellow-green solid. Sinks in and mixes with water. A hydrate of formula (H2SO4)2.7H2O is also known."}, {"from": "gpt", "value": "[O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[O][=U+2][=O]"}]