Using CC(=S)c1c(Cl)cccc1C(=O)N(CC(=O)OC(C)(C)C)C1CCCC1 to produce CC(=S)c1c(Cl)cccc1C(=O)N(CC(=O)O)C1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.