Using OB(O)c1cccnc1, Brc1cc(Br)cc(-c2nc3ccccc3s2)c1 to produce Brc1cc(-c2cccnc2)cc(-c2nc3ccccc3s2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.