Using OB(O)c1ccc(F)cc1F, CC1(c2cccc(Br)c2)COCC(N)=N1 to produce CC1(c2cccc(-c3ccc(F)cc3F)c2)COCC(N)=N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.