Using COC(=O)c1cnc(CBr)cn1, Oc1cccc(OC(F)(F)F)c1 to produce COC(=O)c1cnc(COc2cccc(OC(F)(F)F)c2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.