Using CCOC(=O)C1(NC(=O)c2cc(Cl)cc(Cl)c2O)Cc2ccc(F)cc2C1, BrC1CCC1 to produce CCOC(=O)C1(NC(=O)c2cc(Cl)cc(Cl)c2OC2CCC2)Cc2ccc(F)cc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.