Using CCOC(=O)c1cn(-c2cccc(-c3ccccc3OC(F)(F)F)c2)cn1 to produce O=C(O)c1cn(-c2cccc(-c3ccccc3OC(F)(F)F)c2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.