Using CN(CCNC1CCCc2cc(S(=O)(=O)c3ccccc3)ccc21)C(=O)OC(C)(C)C to produce CNCCNC1CCCc2cc(S(=O)(=O)c3ccccc3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.