Using OC(c1ccc(Cl)c2nc3n(c12)CCCN3c1ccc(Cl)cc1Cl)C(F)(F)F, CI to produce COC(c1ccc(Cl)c2nc3n(c12)CCCN3c1ccc(Cl)cc1Cl)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.