Abstract: | The indole alkaloids alstonine, 10-methoxygeissoschizol, tetrahydroalstonine, vomalidine, α-yohimbine and 19, 20-dehydroyohimbine, an unidentified anhydronium-like base and choline were isolated from Rauwolfia obscura stems. The diester alkaloids reserpine and rescinnamine, which occur in the roots, were not detected. The origin and inter-relationship of the detected alkaloids are discussed. |