[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a 1,1-diunsubstituted alkanesulfonate that is the conjugate base of methanesulfonic acid. It is a conjugate base of a methanesulfonic acid."}, {"from": "gpt", "value": "[C][S][=Branch1][C][=O][=Branch1][C][=O][O-1]"}]