Using Nc1ccc(Cl)cc1, CCOC(=O)C(F)(F)C(O)(Cn1cncn1)c1ccc(F)cc1F to produce O=C(Nc1ccc(Cl)cc1)C(F)(F)C(O)(Cn1cncn1)c1ccc(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.