Using CCC=O, OCCN(c1ccccc1)c1nc(Nc2ccc(-c3cnco3)cc2)nc2c1CNCC2 to produce CCCN1CCc2nc(Nc3ccc(-c4cnco4)cc3)nc(N(CCO)c3ccccc3)c2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.