The Alkaloids of Rauwolfia cumminsii.

Abstract

18 indole alkaloids were isolated from Rauwolfia cumminsii roots and 17 characterised. The alkaloids comprised sarpagan, yohimbine, 18–hydroxy–yohimbine, heteroyohimbine, anhydronium, α–acyl indole and dihydroindole types. Dihydroindoles have not previously been reported in R. cumminsii roots. The distribution of alkaloids throughout the plant is discussed.