[{"from": "human", "value": "Generate a molecule based on the given description. The molecule are uncoupled, which decreases the frequency and force of contractions. (From AMA Drug Evaluations Annual, 1992, p1083)"}, {"from": "gpt", "value": "[O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Mg+2]"}]