Using O=C1c2ccc([N+](=O)[O-])cc2COc2cc(-n3cnnn3)ccc21 to produce Nc1ccc2c(c1)COc1cc(-n3cnnn3)ccc1C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.