[{"from": "human", "value": "What can you tell me about this molecule? [C][C][C][C][S][=Branch1][C][=O][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is an alkanesulfonate in which the alkyl group directly linked to the sulfonate functionality is butyl. It is a conjugate base of a butane-1-sulfonic acid."}]