Using OB(O)c1cncnc1, Brc1cncc(-c2nc(-c3ccccn3)no2)c1 to produce c1ccc(-c2noc(-c3cncc(-c4cncnc4)c3)n2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.