Using Cc1ccccc1OC1CCN(C(=O)C(=O)c2c[nH]c3ccccc23)CC1 to produce Cc1ccccc1OC1CCN(CCc2c[nH]c3ccccc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.