Using CCC1(C(=O)OC)SCCN1C(=O)Nc1cc(Cl)cc(Cl)c1 to produce CCC12SCCN1C(=O)N(c1cc(Cl)cc(Cl)c1)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.