Using OB(O)c1cccnc1, Cc1cc(-c2cccc(-c3ccc(Br)cc3)n2)c(C)[nH]1 to produce Cc1cc(-c2cccc(-c3ccc(-c4cccnc4)cc3)n2)c(C)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.