Using O=[N+]([O-])O, Cc1ccc2c3c(c(=O)oc2c1)CNCC3 to produce Cc1cc2oc(=O)c3c(c2cc1[N+](=O)[O-])CCNC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.