Using Nc1nc2cccc(Br)n2n1, OB(O)c1cnn(Cc2ccccc2)c1 to produce Nc1nc2cccc(-c3cnn(Cc4ccccc4)c3)n2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.