Using COC(COc1ccc(C(C)=O)c(NC(=O)c2csc(C(C)C)n2)c1Cl)OC to produce COC(COc1ccc2c(O)cc(-c3csc(C(C)C)n3)nc2c1Cl)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.