Using O=C(c1ccccc1)c1cn(-c2cccc(Br)c2)cn1, OB(O)c1ccccc1 to produce O=C(c1ccccc1)c1cn(-c2cccc(-c3ccccc3)c2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.