(3,4'-Bipyridine)-5-carbonitrile, 1,6-dihydro-1,2-dimethyl-6-oxo- 1,2-Dimethyl-6-oxo-1,6-dihydro-3,4'-bipyridine-5-carbonitrile 1,2-Dimethyl-6-oxo-1,6-dihydro-3.4'-bipyridine-5-carbonitrile hydrobromide monohydrate 1,2-Dodbc 80047-23-0