Using CC(=O)NC(C)c1nnc(-c2ccc([N+](=O)[O-])cc2)[nH]c1=O to produce Cc1nc(C)n2nc(-c3ccc([N+](=O)[O-])cc3)[nH]c(=O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.