Using COC(=O)c1cccc2ccc(-c3cccc(OC(F)(F)F)c3)nc12 to produce O=C(O)c1cccc2ccc(-c3cccc(OC(F)(F)F)c3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.