Using Oc1cnc2c(F)c(F)ccc2c1, CC(=O)c1c(F)cccc1F to produce CC(=O)c1c(F)cccc1Oc1cnc2c(F)c(F)ccc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.