Using [N-]=[N+]=[N-], Clc1ccc2nc(Cl)nc(-c3ccccc3)c2c1 to produce Clc1ccc2c(c1)c(-c1ccccc1)nc1nnnn12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.