Using Nc1ccccc1C(=O)NC(Cc1ccc([N+](=O)[O-])c(OCc2ccccc2)c1)C(=O)O to produce O=C1NC(Cc2ccc([N+](=O)[O-])c(OCc3ccccc3)c2)C(=O)Nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.