4,5,4',5'-tetramethyl-2,2'-biimidazole, 4,5,4',5'-tetramethylbiimidazole, 2,2'-Bi-1H-imidazole,4,4',5,5'-tetramethyl, EINECS 273-955-6, 2,2',4,4'-tetramethylbiimidazole, 2,2'-BIPYRIDINE-5-CARBALDEHYDE, 4,4',5,5'-tetramethyl-2,2'-bi-1H-imidazole, 2,2'-bis(4,5-dimethylimidazolyl), 2,2'-Bis(4,5-dimethylimidazole)