Using N=C(N)Nc1ccc(C(=O)O)cc1, Nc1nc2ccc([N+](=O)[O-])cc2s1 to produce N=C(N)Nc1ccc(C(=O)Nc2nc3ccc([N+](=O)[O-])cc3s2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.