Using [N-]=[N+]=[N-], Cn1cc(C(=O)NCc2ccc(Cl)cc2)c(=O)c2cc(CCl)ccc21 to produce Cn1cc(C(=O)NCc2ccc(Cl)cc2)c(=O)c2cc(CN=[N+]=[N-])ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.