Article Sidebar download PDF DOI: Article Details Issue Vol. 4 No. 2 (1990) Section Articles Main Article Content Praecansone A: Evidence for the existence of 8,9-(E) and 8,9-(Z) isomers in extracts from <i>tephrosia pumila</i> Ermias Dagne Abiy Yenesew Alexander I. Gray Peter G. Waterman Abstract Bull. Chem. Soc. Ethiop., 4(2) 141-145 (1990).