Using O=C1NC(=O)c2cc(Oc3ccc([N+](=O)[O-])cc3)ccc21 to produce Nc1ccc(Oc2ccc3c(c2)C(=O)NC3=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.