Using CC(c1ccc(Cl)cc1Cl)C(O)(c1cc[nH]c(=O)c1)C(F)(F)F, COC(=O)CBr to produce COC(=O)COc1cc(C(O)(C(C)c2ccc(Cl)cc2Cl)C(F)(F)F)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.