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 )-voacristine, (19 S )-voacristine hydroxyindolenine, ajmalicine, and ajmalicinine, were also isolated. Voacangine was the main alkaloid constituent.
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Madinaveitia et al. (1996) studied this question.
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