Using C[S-], CC(C)(C)OC(=O)N1CCOC(C2CO2)C(c2ccc(Cl)c(Cl)c2)C1 to produce CSCC(O)C1OCCN(C(=O)OC(C)(C)C)CC1c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.