Using COc1cccc(C(CBr)OCCNS(=O)(=O)c2ccc([N+](=O)[O-])cc2)c1 to produce COc1cccc(C2CN(S(=O)(=O)c3ccc([N+](=O)[O-])cc3)CCO2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.