Using Brc1cccc(I)c1, OB(O)c1ccc(-c2ccccc2)c2ccccc12 to produce Brc1cccc(-c2ccc(-c3ccccc3)c3ccccc23)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.