Using O=CN1CCOCC1, COc1ccc(Br)cc1COCc1ccc(C(F)(F)F)cc1 to produce COc1ccc(C=O)cc1COCc1ccc(C(F)(F)F)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.