Alkaloids from stems of Ervatamia yunnanensis

Abstract Six indole alkaloids were isolated from the stems of Ervatamia yunnanensis . Among them, yunnanensine ( I ) is new. The other five are known alkaloids, namely: 19,20- E -vallesamine ( II ), 19s-heyneanine ( III ), ibogaine ( IV ), ibogamine ( V ), coronaridine ( VI ). The structural elucidation of the alkaloids was based on spectral means.