Using FC(F)(F)c1ccc(-c2oncc2CCl)cc1, CCOC(=O)CC(=O)OCC to produce O=C(O)CCc1cnoc1-c1ccc(C(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.