Using Nc1c(Cl)cc(C(F)(F)F)cc1Cl, [N-]=[N+]=[N-] to produce [N-]=[N+]=Nc1c(Cl)cc(C(F)(F)F)cc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.