Using ClCn1cc(Cl)c(-c2cc(Cl)cc(Cl)c2)n1, [N-]=[N+]=[N-] to produce [N-]=[N+]=NCn1cc(Cl)c(-c2cc(Cl)cc(Cl)c2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.