Using N=C(Nc1ccc(C(F)(F)F)cc1)c1ccc(Cl)cc1Cl, CCOC(=O)C(=O)C(C)Br to produce CCOC(=O)c1nc(-c2ccc(Cl)cc2Cl)n(-c2ccc(C(F)(F)F)cc2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.