Using O=Cc1ccc(OC(F)F)c(OC(F)F)c1, COc1cc(Br)cc(OC)c1 to produce COc1cc(OC)cc(C(O)c2ccc(OC(F)F)c(OC(F)F)c2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.