.alpha.,.alpha.'-Bipyridine .alpha.,.alpha.'-Bipyridyl .alpha.,.alpha.'-Dipyridine .alpha.,.alpha.'-Dipyridyl 2,2'-Bipyridin 2,2'-Bipyridine 2,2'-Bipyridyl 2,2'-Dipyridine 2,2'-Dipyridyl 366-18-7 AA-DP Bipyridine CI 588 NSC1550 WLN: T6NJ B- BT6NJ