Using O=C(CCCCCOc1ccc2nc(-c3ccccc3)n(-c3ccccc3)c2c1)NOCc1ccccc1 to produce O=C(CCCCCOc1ccc2nc(-c3ccccc3)n(-c3ccccc3)c2c1)NO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.