Using COC(=O)c1ccc(CBr)cc1, Oc1cc(-c2ccc(OC(F)(F)F)cc2)cc2ccccc12 to produce COC(=O)c1ccc(COc2cc(-c3ccc(OC(F)(F)F)cc3)cc3ccccc23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.