Using [N-]=[N+]=Nc1nc(N=[N+]=[N-])nc(NNc2nc(N=[N+]=[N-])nc(N=[N+]=[N-])n2)n1 to produce [N-]=[N+]=Nc1nc(N=Nc2nc(N=[N+]=[N-])nc(N=[N+]=[N-])n2)nc(N=[N+]=[N-])n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.