4 4'-di-tertbutyl-2 2'-bipyridine July 8, 2019 16 32 64 128 4 4′-di-tert-butyl-2 2′-bipyridine-6-n-cyano carboxamidine 4 4′-di-tert-butyl-2 2′-bipyridine 4 4'-di-tert-butyl-2 2'-dipyridyl
