Using COC(=O)CCNC(=O)c1ccc(N2CCN(C3CCN(C(=O)OCc4ccccc4)CC3)C2=O)cc1 to produce COC(=O)CCNC(=O)c1ccc(N2CCN(C3CCNCC3)C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.