Using CC(C)(C)OC(=O)N1CC(c2cc(F)cc(F)c2)NC(=O)C1C1CCOCC1, COC(=O)CBr to produce COC(=O)CN1C(=O)C(C2CCOCC2)N(C(=O)OC(C)(C)C)CC1c1cc(F)cc(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.