Using COC(=O)c1ncc(F)c(-c2ccc(Cl)cc2)n1, OCC(F)(F)F to produce COC(=O)c1ncc(OCC(F)(F)F)c(-c2ccc(Cl)cc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.