Using CC(C)(C)OC(=O)OC(=O)OC(C)(C)C, Brc1c[nH]c2cnccc12 to produce CC(C)(C)OC(=O)n1cc(Br)c2ccncc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.