Using c1ccc(Nc2ccccn2)nc1, Brc1ccc(N(c2ccncc2)c2ccncc2)cc1 to produce c1ccc(N(c2ccc(N(c3ccncc3)c3ccncc3)cc2)c2ccccn2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.