Using COC(=O)C1C(=O)Nc2ccc(C(F)(F)F)cc2CC1c1ccccc1OC, COCBr to produce COCN1C(=O)C(C(=O)OC)C(c2ccccc2OC)Cc2cc(C(F)(F)F)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.