The present investigation of Tabernanthe iboga root records the isolation of twelve compounds, which includes not only the four known alkaloids ibogamine, ibogaine, tabernanthine and iboluteine but also iboquine, desmethoxyiboluteine, the hydroxyindolenine derivatives of ibogaine and ibogamine, voacangine, gabonine, kisantine and kimvuline. Of these, the latter three have not been described previously. © 1958, American Chemical Society. All rights reserved.