Using CCOC(=O)[C@H]1CCN(C(=O)OC(C)(C)C)[C@H]1c1ncccc1S(=O)(=O)C(C)C to produce CCOC(=O)[C@H]1CCN[C@H]1c1ncccc1S(=O)(=O)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.