Using CCc1cc(OCC=C(Cl)Cl)cc(CC)c1OCCCCOCC=O, CCCS to produce CCCSC(COCCCCOc1c(CC)cc(OCC=C(Cl)Cl)cc1CC)SCCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.