[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule appears as a white, odorless crystalline powder. Denser than water. Contact may cause irritation to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other chemicals."}, {"from": "gpt", "value": "[F][Si-2][Branch1][C][F][Branch1][C][F][Branch1][C][F][Branch1][C][F][F].[K+1].[K+1]"}]