Using O=[N+]([O-])c1cccc2c1CCNC2, O=[N+]([O-])O to produce O=[N+]([O-])c1cc2c(c([N+](=O)[O-])c1)CCNC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.