Using O=C(CCC(=O)n1cc(Cc2cccc([N+](=O)[O-])c2)c2ccccc21)OCc1ccccc1 to produce Nc1cccc(Cc2cn(C(=O)CCC(=O)O)c3ccccc23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.