Using CC(=O)OC(COCCO)c1cccc(Cl)c1, CS(=O)(=O)Cl to produce CC(=O)OC(COCCOS(C)(=O)=O)c1cccc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.