Using O=Cc1ccc(Cl)c(Cl)c1, CCOC(=O)COc1ccc(S)cc1C to produce CCOC(=O)COc1ccc(Sc2ccc(C=O)cc2Cl)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.