Iboga-type alkaloids are a set of monoterpene indole alkaloids comprising naturally occurring compounds found in Tabernanthe and Tabernaemontana, as well as synthetic structural analogs. Naturally occurring iboga-type alkaloids include ibogamine, ibogaine, tabernanthine, and other substituted ibogamines . Ibogaine is a hallucinogen and is referred to as an oneirogen. Many iboga-type alkaloids display biological activities such as cardiac toxicity and psychoactive effects, and some have been studied as potential treatments for drug addiction.
Naturally-occurring
Substituted ibogamines
PubChem Name R1 R2 R3 R4 100217 Ibogamine H H H H 197060 Ibogaine OMe H H H 3083548 Noribogaine OH H H H 6326116 Tabernanthine H OMe H H 193302 Ibogaline OMe OMe H H 73489 Coronaridine H H CO2Me H 73255 Voacangine OMe H CO2Me H 363281 Isovoacangine H OMe CO2Me H 65572 Conopharyngine OMe OMe CO2Me H 11077316 19(S)-Hydroxyibogamine H H H OH 71656190 Iboxygaine / Kimvuline OMe H H OH H OMe H OH OMe OMe H OH 15559732 19(S)-Hydroxycoronaridine H H CO2Me OH 196982 Voacristine OMe H CO2Me OH 10362598 Isovoacristine H OMe CO2Me OH 102004638 19(S)-Hydroxyconopharyngine OMe OMe CO2Me OH
Catharanthine is an unsaturated analog of coronaridine.
Oxidation products Similarly to other ring-constrained tryptamines such as yohimbine and mitragynine (see mitragynine pseudoindoxyl), oxidation and rearrangement products of substituted ibogamines have been reported, such as iboluteine (ibogaine pseudoindoxyl) (CID:21589055) and voaluteine (CID:633439).
Other alkaloids Vobasine Ervaticine Dregamine Vinblastine
Treatment of drug dependence Ibogaine and related alkaloids reduce the craving for subsequent doses in individuals experiencing withdrawal symptoms associated with drug addiction. Their use has been investigated in several clinical studies involving individuals dependent on opioids, cocaine, and other substances. While positive effects—such as alleviation of withdrawal symptoms, improvement in depression, and mitigation of post-traumatic symptoms—have been confirmed, severe medical complications, including fatal cases, have also been reported due to neurotoxic and cardiotoxic side effects.
Synthetic analogues
18-MC, ME-18-MC, and 18-MAC are coronaridine analogs with similar anti-addictive effects.
More distantly related synthetic analogs include:
Varenicline, a polycyclic azepine and anti-addictive agent that similarly targets nicotinic acetylcholine receptors, but acts as a partial agonist instead. Tabernanthalog is a structural simplification of tabernanthine and "non-hallucinogenic psychoplastogen".
See also Strictosidine Bwiti Ibogalog List of investigational hallucinogens and entactogens Oxa-noribogaine Substituted β-carboline and harmala alkaloid
References