Using FC(F)Oc1cc(-c2ccc(Cl)cc2Cl)n[nH]1, COS(=O)(=O)OC to produce Cn1nc(-c2ccc(Cl)cc2Cl)cc1OC(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.