Using CC(C)(C)OC(=O)N1CC(=O)C1, ClCc1cc(Br)ccc1I to produce CC(C)(C)OC(=O)N1CC2(C1)OCc1cc(Br)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.