Stereoselective transformation of ajmaline into three minor Gelsemium alkaloids, koumidine, (19Z)-anhydrovobasinediol [(19Z)-taberpsychine] and N-demethoxyrankinidine and their absolute configuration

Stereoselective transformation of ajmaline into three minor Gelsemium alkaloids, koumidine, (19Z)-anhydrovobasinediol [(19Z)-taberpsychine] and N-demethoxyrankinidine and their absolute configuration Partial synthesis and the absolute configuration of two new Gelsemium alkaloids, koumidine and (19Z)-taberpsychine A First synthesis of 20-hydroxydihydrorankinidine, a new oxindole alkaloid from Gelsemium elegans benth. Studies on the indole alkaloids of gelsem1um elegans (thailand): structure elucidation and proposal of biogenetic route Indole alkaloids isolated from Gelsemium elegans (Thailand): 19-(Z)-akuammidine, 16-epi-voacarpine, 19-hydroxydihydrogelsevirine, and the revised structure of koumidine. Indole alkaloids isolated from Gelsemium elegans (Thailand): 19-(Z)-akuammidine, 16-epi-voacarpine, 19-hydroxydihydrogelsevirine, and the revised structure of koumidine. New Monoterpenoid Indole Alkaloids from Gelsemium elegans N-methoxyanhydrovobasinediol from Gelsemium elegans First Synthesis of the Novel Gelsemium Alkaloids, Gelselegine, Gelsenicine, and Gelsedine Using a Biomimetic Approach 19-(R)- and 19-(S)-Hydroxydihydrokoumine from Gelsemium elegans