Using CCOC(=O)c1c(-c2ccc(Cl)cc2)cc(C(F)(F)F)n1Cc1ccccc1 to produce O=C(O)c1c(-c2ccc(Cl)cc2)cc(C(F)(F)F)n1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.