Using COC(=O)c1ccc(N2CCc3cc(-c4ccc(Cl)cc4)sc3C2=O)cc1OC to produce COc1cc(N2CCc3cc(-c4ccc(Cl)cc4)sc3C2=O)ccc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.