Using O=c1[nH]cc(Cc2cccc([N+](=O)[O-])c2)n2cc(-c3c[nH]c4ncccc34)cc12 to produce Nc1cccc(Cc2c[nH]c(=O)c3cc(-c4c[nH]c5ncccc45)cn23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.