Using O=[N+]([O-])c1cc(CBr)c2occc2c1, CC1CN(C(=O)OC(C)(C)C)CCN1 to produce CC1CN(C(=O)OC(C)(C)C)CCN1Cc1cc([N+](=O)[O-])cc2ccoc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.