Using CC(O)=S, O=C(OC(c1ccccc1)c1ccccc1)C(O)Cc1ccc(F)cc1 to produce CC(=O)SC(Cc1ccc(F)cc1)C(=O)OC(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.