Using CCOC(=O)CC(=O)C(F)(F)F, O=C(Cl)c1cc(C(F)(F)F)ccc1F to produce CCOC(=O)c1c(C(F)(F)F)oc2ccc(C(F)(F)F)cc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.