Using CC(C)(C)OC(=O)CCCC(CSc1ccc(Cl)c(Cl)c1)C(=O)OC(C)(C)C to produce COC(=O)CCCC(CSc1ccc(Cl)c(Cl)c1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.