Using CC(C)(C)OC(=O)N1CCN(c2ccc(N3CCN(C(=O)OCc4ccccc4)CC3)cc2)c2ccccc21 to produce CC(C)(C)OC(=O)N1CCN(c2ccc(N3CCNCC3)cc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.