Using CCOC(=O)c1cnc(-c2ccc(C(F)(F)F)cc2)nc1C1CC1 to produce O=C(O)c1cnc(-c2ccc(C(F)(F)F)cc2)nc1C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.