|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||525.398 g·mol−1|
|3D model (JSmol)|
|(what is this?)|
5-I-R91150 (or R93274) is a compound that acts as a potent and selective antagonist of 5-HT2A receptors. Its main application is as its iodine-123 radiolabeled form, in which it can be used in SPECT scanning in human neuroimaging studies, to examine the distribution of the 5-HT2A receptor subtype in the brain, e.g. with respect to sex and age and in adults with Asperger syndrome or Alzheimer's disease.
An alternative 5-HT2A receptor ligand also used in neuroimaging is altanserin.
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