Using Nc1ccc(-c2nn[nH]n2)cc1N, S=C(c1ncc[nH]1)c1ncc[nH]1 to produce S=c1[nH]c2ccc(-c3nn[nH]n3)cc2[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.