Using O=[N+]([O-])c1cc[nH]n1, CC(C)(C)OC(=O)CCBr to produce CC(C(=O)OC(C)(C)C)n1ccc([N+](=O)[O-])n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.