Using CC(C)(C)OC(=O)NC1CCN(S(=O)(=O)c2ccc(CN3C(=O)c4ccccc4C3=O)cc2)CC1 to produce CC(C)(C)OC(=O)NC1CCN(S(=O)(=O)c2ccc(CN)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.