Using CC(c1ccc(Cl)cc1Cl)C(O)(c1ccncc1)C(F)(F)F, CI to produce COC(c1ccncc1)(C(C)c1ccc(Cl)cc1Cl)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.