Using COC(=O)C(CC1CCC2(C1)OCCCO2)c1ccc(S(C)(=O)=O)c(Cl)c1 to produce COC(=O)C(CC1CCC(=O)C1)c1ccc(S(C)(=O)=O)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.