Using Cc1ccc(S(=O)(=O)OCC2CCN(C(=O)OC(C)(C)C)CC2)cc1, CCOC(=O)CC(=O)OCC to produce CCOC(=O)C(CC1CCN(C(=O)OC(C)(C)C)CC1)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.