Using CN(c1ccc(CC2CCN(C(=O)OC(C)(C)C)CC2)cc1)S(C)(=O)=O to produce CN(c1ccc(CC2CCNCC2)cc1)S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.