Using COc1ccc(C2CN(Cc3ccccc3)C(=O)N2C(C(=O)NOCc2ccccc2)C(C)C)cc1 to produce COc1ccc(C2CN(Cc3ccccc3)C(=O)N2C(C(=O)NO)C(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.