4 4'-dimethyl-2 2'-bipyridyl July 8, 2019 16 32 64 128 4 4'-dimethyl-2 2'-bipyridine 4 4’ dimethyl 2 2’ bipyridyl 2 methyl 2 butanol 4 4′-bis(1 1-dimethylethyl)-2 2′-bipyridine 2 4-диметилпентан қышқылы
