Using Cc1ccc(S(=O)(=O)Nc2cc(C)cc([N+](=O)[O-])c2N)cc1, OCCBr to produce Cc1ccc(S(=O)(=O)N(CCO)c2cc(C)cc([N+](=O)[O-])c2N)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.