Using O=C(Cl)c1ccc(Cl)cc1, COC(=O)c1cc(SC)cn1C to produce COC(=O)c1cc(SC)c(C(=O)c2ccc(Cl)cc2)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.