Using CCC(=O)CC(=O)OC, FC(F)(F)c1cnc(Cl)c(Cl)c1 to produce CCC(=O)C(C(=O)OC)c1ncc(C(F)(F)F)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.