[{"from": "human", "value": "Describe this molecule. [C][O][S][=Branch1][C][=O][=Branch1][C][=O][C][Branch1][C][F][Branch1][C][F][F]"}, {"from": "gpt", "value": "The molecule is a brown liquid. Insoluble in water.  This material is a very reactive methylating agent, also known as methyl triflate."}]