(3,4'-Bipyridine)-3'-carbonitrile, 1',4'-dihydro-5'-acetyl-2'-mercapto-6'-methyl- 1',4'-Dihydro-5'-acetyl-2'-mercapto-6'-methyl-(3,4'-bipyridine)-3'-carbonitrile 109619-35-4 BRN 5065343