[{"from": "human", "value": "Could you provide a description of this molecule? [C][S][=Branch1][C][=O][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "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."}]