[{"from": "human", "value": "Describe this molecule. [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][S][=Branch1][C][=O][=Branch1][C][=O][F]"}, {"from": "gpt", "value": "The molecule is an acyl fluoride with phenylmethanesulfonyl as the acyl group. It has a role as a serine proteinase inhibitor. It is functionally related to a phenylmethanesulfonic acid."}]