Using Cc1cn2c(=O)c(C(=O)O)cnc2c2cc([N+](=O)[O-])ccc12 to produce Cc1cn2c(=O)c(C(=O)[O-])cnc2c2cc([N+](=O)[O-])ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.