%0 Journal Article %T Activated esters of substituted pyrazinecarboxylic acids %A Shepard, Kenneth L. %A Halczenko, Wasyl %A Cragoe, Edward J. %J Journal of Heterocyclic Chemistry %V 13 %N 6 %P 1219-1224 %@ 0022-152X %D 1976-12-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve