Using OB(O)c1cccnc1, O=c1[nH]c2cc(Cc3cccc(Br)c3)nn2c2ccccc12 to produce O=c1[nH]c2cc(Cc3cccc(-c4cccnc4)c3)nn2c2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.