Using CC(C)(C)OC(=O)N1CCC(O)C1, Clc1ncc(Br)c(Cl)n1 to produce CC(C)(C)OC(=O)N1CCC(Oc2nc(Cl)ncc2Br)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.