[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is highly toxic to mammals and insects and it is used as a pesticide. The more common fluorinated acetic acid, trifluoroacetic acid and its sodium salt are far less toxic. (L1713)"}, {"from": "gpt", "value": "[C][Branch1][=Branch1][C][=Branch1][C][=O][O][F]"}]