Using CCOC(=O)Cn1c(Nc2ccc([N+](=O)[O-])cc2)nc2cccnc21 to produce O=[N+]([O-])c1ccc(Nc2nc3cccnc3n2CCO)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.