Using CCCc1nn(C)c2c(=O)[nH]c(-c3ccccc3OCC)nc12, O=[N+]([O-])O to produce CCCc1nn(C)c2c(=O)[nH]c(-c3cc([N+](=O)[O-])ccc3OCC)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.