Using O=S(=O)(OCCCOC(F)(F)F)C(F)(F)F, CCc1ccc(C(=O)OC)cc1O to produce CCc1ccc(C(=O)OC)cc1OCCCOC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.