Using C[O-], Cc1ccc(S(=O)(=O)OC[C@@H]2CN(C(=O)OC(C)(C)C)CC[C@@H]2NC(=O)c2[nH]c(C)c(Cl)c2Cl)cc1 to produce COC[C@@H]1CN(C(=O)OC(C)(C)C)CC[C@@H]1NC(=O)c1[nH]c(C)c(Cl)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.