The stem bark of the Panamanian plant Stemmademia obovata has afforded a new ibogaine-type alkaloid, obovamine ( 1 ), whose structure was determined by a combination of spectral interpretation and chemical correlations. Ten known alkaloids, coronaridine, coronaridine hydroxyindolenine, voacangine, voacangine hydroxyindolenine, (19 S )-heyneanine, (19 S )-heyneanine hydroxyindolenine, (19 S...