Using CNC(=O)c1ccc2ccn(C3CCN(C(=O)OCc4ccccc4)CC3)c2c1 to produce CNC(=O)c1ccc2ccn(C3CCNCC3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.