Using O=[N+]([O-])c1cc(S(=O)(=O)Cl)ccc1Cl, CNCCO to produce CN(CCO)S(=O)(=O)c1ccc(Cl)c([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.