Using Nc1nc(C(=O)O)c(C(=O)c2ccc([N+](=O)[O-])cc2)s1 to produce Nc1ccc(C(=O)c2sc(N)nc2C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.