Using O=C(Nc1ccc(-c2c[nH]c(=O)cn2)cc1)c1cccc([N+](=O)[O-])c1 to produce Nc1cccc(C(=O)Nc2ccc(-c3c[nH]c(=O)cn3)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.