Using Cc1nn(C)c(-c2ccc(F)cc2F)c1C(=O)c1ccc(F)cc1F to produce Cc1nn(C)c(-c2ccc(F)cc2F)c1C(O)c1ccc(F)cc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.