Using O=[N+]([O-])c1ccc2[nH]cc(Cc3cccnc3)c2c1, C=CC(=O)OC to produce COC(=O)CCn1cc(Cc2cccnc2)c2cc([N+](=O)[O-])ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.