Synonyms : 2, 2 Dipyridyl, 2, 2' Dipyridyl, 2, 2'-Bipyridine, 2, 2-Bipyridyl, 2, 2-Dipyridyl, 2, 2 Bipyridine, 2, 2 Bipyridyl, 2, 2' Bipyridine, Dipyridyl, 2, 2, Dipyridyl, 2, 2', alpha, alpha Dipyridyl