5-Hydroxyindole, 5-Indolol or NSC 87503, is an indole alkaloid mood enhancer.[1][2] It is a positive allosteric modulator of the serotonin 5-HT3 receptor.[3]

5-Hydroxyindole
Skeletal formula of 5-Hydroxyindole
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.016.166 Edit this at Wikidata
EC Number
  • 217-782-6
UNII
  • InChI=1S/C8H7NO/c10-7-1-2-8-6(5-7)3-4-9-8/h1-5,9-10H
    Key: LMIQERWZRIFWNZ-UHFFFAOYSA-N
  • C1=CC2=C(C=CN2)C=C1O
Properties
C8H7NO
Molar mass 133.15 g/mol
Related compounds
Related compounds
Indole, 5-Hydroxyindoline, Serotonin
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

References

edit
  1. "5-Hydroxyindole 97 1953-54-4". Sigmaaldrich.com. Archived from the original on 2022-07-05. Retrieved 2026-06-16.
  2. Jakaria, Md; Cannon, Jason R. (July 16, 2025). "The role of hydroxyindoles in protecting neuronal cultures from ferroptosis". Cell Death Discovery. 11 (1): 329. doi:10.1038/s41420-025-02608-4. ISSN 2058-7716. PMC 12267586. PMID 40670345.
  3. Newman, Amy S.; Batis, Nikolaos; Grafton, Gillian; Caputo, Francesca; Brady, Catherine A.; Lambert, Jeremy J.; Peters, John A.; Gordon, John; Brain, Keith L.; Powell, Andrew D.; Barnes, Nicholas M. (July 2013). "5-Chloroindole: a potent allosteric modulator of the 5-HT₃ receptor". British Journal of Pharmacology. 169 (6): 1228–1238. doi:10.1111/bph.12213. ISSN 1476-5381. PMC 3831704. PMID 23594147.