Using COC(=O)CCc1nc(-c2cc(Br)cc(C(F)(F)F)c2)co1, OB(O)c1cccs1 to produce COC(=O)CCc1nc(-c2cc(-c3cccs3)cc(C(F)(F)F)c2)co1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.