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5-Phenoxytryptamine

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Pharmaceutical compound
5-Phenoxytryptamine
Clinical data
Other names5-Phenyloxytryptamine; 5-PhO-T; OVT2; OVT-2; Otava 3736689
Drug classSerotonin 5-HT2A receptor agonist;Serotonergic psychedelic;Hallucinogen
ATC code
  • None
Identifiers
  • 2-(5-phenoxy-1H-indol-3-yl)ethanamine
CAS Number
PubChemCID
ChemSpider
ChEMBL
CompTox Dashboard(EPA)
Chemical and physical data
FormulaC16H16N2O
Molar mass252.317 g·mol−1
3D model (JSmol)
  • C1=CC=C(C=C1)OC2=CC3=C(C=C2)NC=C3CCN
  • InChI=1S/C16H16N2O/c17-9-8-12-11-18-16-7-6-14(10-15(12)16)19-13-4-2-1-3-5-13/h1-7,10-11,18H,8-9,17H2
  • Key:ZURXROHPCVOMGH-UHFFFAOYSA-N

5-Phenoxytryptamine (5-PhO-T), also known asOVT2 orOtava 3736689, is apsychedelic drug of thetryptamine family related to5-methoxytryptamine (5-MT; 5-MeO-T).[1][2] It is thederivative oftryptamine and 5-methoxytryptamine in which there is aphenoxy group at the 5 position.[2] The drug acts as abiased agonist of theserotonin5-HT2A receptor, favoringGαisignaling overGαq andβ-arrestin1 signaling, though not favoring Gαq signaling overβ-arrestin2 signaling.[1][2] Itsaffinity (Ki) for the serotonin 5-HT2A receptor is 57.5 nM and itsactivationalpotency at this receptor ranges from 0.28 nM to 15,800 nM andefficacy ranges from 30% to 91% depending on the downstreamsignaling pathway.[2] OTV2, given viaintracerebroventricular injection, produces thehead-twitch response, a behavioral proxy of psychedelic effects, in rodents.[2] In addition, it produceslong-term memorydeficits that are dependent on serotonin 5-HT2A receptor activation in rodents.[2] The drug was first described in thescientific literature by Elk Kossatz and colleagues in 2024.[1][2]

See also

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References

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  1. ^abcJastrzębski MK, Wójcik P, Grudzińska A, Andreozzi G, Vetrò T, Asim A, et al. (September 2025)."Biased signalingvia serotonin 5-HT2A receptor: From structural aspects toin vitro andin vivo pharmacology".Acta Pharmaceutica Sinica. B.15 (9):4438–4455.doi:10.1016/j.apsb.2025.07.002.PMC 12491688.PMID 41049744.Likewise, Kossatz et al.71 explored the complex nature of 5-HT2A receptor signaling in response to different signaling probes by using MD simulations followed by in vitro and in vivo studies. They utilized small molecules (for example OTV1 (2-[5-(2,3-dihydro-1,4-benzodioxin-6-yl)-1H-indol-3-yl]ethan-1-amine), OTV2 (2-(5-phenoxy-1H-indol-3-yl)ethan-1-amine)) and Nitro-I (2-(5-nitro-1H-indol-3-yl)ethamine hydrochloride)) that were close analogs of 5-HT agonists as probes and observed their coupling preferences to provide an insight into the structural basis of functional selectivity. The outcomes showed that the type of ligand interaction with the extracellular loop 2 ECL2 mainly affects the potential of 5-HT2A receptor to activate different G protein subtypes. In addition, small molecules in this study have shown an overall preference for Gαq over Gαi and ß-arrestin subtypes. Interestingly, it was shown that substitutions at position 5 of OTV1 could shift the coupling preferences to Gαi over Gαq. Moreover, different chemical modifications lead to the activation of the preferred G-protein subtype ultimately leading to different physiology responses as well71.
  2. ^abcdefgKossatz E, Diez-Alarcia R, Gaitonde SA, Ramon-Duaso C, Stepniewski TM, Aranda-Garcia D, et al. (May 2024)."G protein-specific mechanisms in the serotonin 5-HT2A receptor regulate psychosis-related effects and memory deficits".Nature Communications.15 (1) 4307.Bibcode:2024NatCo..15.4307K.doi:10.1038/s41467-024-48196-2.PMC 11137019.PMID 38811567.
Tryptamines
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4-Hydroxytryptamines
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5-HT1
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