Using CCOC(=O)C1=C(C)NC2=C(C1c1cccc(Cl)c1Cl)S(=O)(=O)CCN(C(=O)OC(C)(C)C)C2 to produce CCOC(=O)C1=C(C)NC2=C(C1c1cccc(Cl)c1Cl)S(=O)(=O)CCNC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.