Using OCCc1ccccc1, O=S(=O)(Cc1cc(F)ccc1F)c1ccc(Cl)cc1 to produce O=S(=O)(c1ccc(Cl)cc1)C(CCc1ccccc1)c1cc(F)ccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.