Using COC(c1cccc([N+](=O)[O-])c1)c1c[nH]c2ncc(-c3cccnc3)cc12 to produce O=[N+]([O-])c1cccc(Cc2c[nH]c3ncc(-c4cccnc4)cc23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.