[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a fuming liquid. It may be corrosive to skin, eyes and mucous membranes. This material may be toxic by inhalation. It is used as a catalyst in chemical reactions."}, {"from": "gpt", "value": "[B][Branch1][C][F][Branch1][C][F][F].[O].[O]"}]