25I-NBF (2C-I-NBF, NBF-2C-I, Cimbi-21) is a derivative of the

phenethylamine Phenethylamine (PEA) is an organic compound, natural monoamine alkaloid, and trace amine, which acts as a central nervous system stimulant in humans. In the brain, phenethylamine regulates monoamine neurotransmission by binding to trace amin ...

2C-I 2C-I is a psychedelic phenethylamine of the 2C family. It was first synthesized by Alexander Shulgin and described in his 1991 book '' PiHKAL'' (''Phenethylamines I Have Known and Loved''). The drug has been used recreationally as psychedelic and ...

, which acts as a highly potent

partial agonist In pharmacology, partial agonists are drugs that bind to and activate a given receptor, but have only partial efficacy at the receptor relative to a full agonist. They may also be considered ligands which display both agonistic and antagonistic e ...

for the

human Humans (''Homo sapiens'') are the most abundant and widespread species of primate, characterized by bipedalism and exceptional cognitive skills due to a large and complex brain. This has enabled the development of advanced tools, culture, ...

5-HT_2A

receptor Receptor may refer to: * Sensory receptor, in physiology, any structure which, on receiving environmental stimuli, produces an informative nerve impulse *Receptor (biochemistry), in biochemistry, a protein molecule that receives and responds to a ...

, with bias towards the

β-arrestin 2 Beta-arrestin-2, also known as arrestin beta-2, is an intracellular protein that in humans is encoded by the ''ARRB2'' gene. Members of arrestin/beta-arrestin protein family are thought to participate in agonist-mediated desensitization of G prot ...

coupled signalling pathway. It has been studied in its ¹¹C

radiolabelled Isotopic labeling (or isotopic labelling) is a technique used to track the passage of an isotope (an atom with a detectable variation in neutron count) through a reaction, metabolic pathway, or cell. The reactant is 'labeled' by replacing specific ...

form as a potential ligand for mapping the distribution of 5-HT_2A receptors in the brain, using

positron emission tomography Positron emission tomography (PET) is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes in Metabolism, metabolic processes, and in other physiological activities including bl ...

(PET).

Legality

25I-NBF is illegal in Hungary, Japan, Latvia, and Vermont.

Sweden

The Riksdag added 25I-NBF to Narcotic Drugs Punishments Act under ''Swedish schedule I'' (''"substances, plant materials and fungi which normally do not have medical use"'') as of January 26, 2016, published by Medical Products Agency (MPA) in regulation ''HSLF-FS 2015:35'' listed as 25I-NBF, and 2-(4-jodo-2,5-dimetoxifenyl)-N-(2-fluorobensyl)etanamin.

United Kingdom

Analogues and derivatives

References

{{Phenethylamines 25-NB (psychedelics) Designer drugs Fluoroarenes Iodoarenes