Using CN1CCN(c2c3c(cn(C)c2=O)C(=O)N(CCc2ccc4ccccc4n2)C3=O)CC1 to produce CN1CCN(c2c3c(cn(C)c2=O)C(=O)N(CCc2ccc4ccccc4n2)C3O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.