Using COc1ccc(C(O)(C(C)c2ccc(Br)cc2Cl)C(F)(F)F)cn1 to produce CC(c1ccc(Br)cc1Cl)C(O)(c1ccc(=O)[nH]c1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.