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O-4310 structure.png
CAS Number
PubChem CID
Chemical and physical data
Molar mass264.344 g·mol−1
3D model (JSmol)

O-4310 (1-isopropyl-6-fluoro-psilocin) is a tryptamine derivative developed by Organix Inc which acts as a serotonin receptor agonist. It is claimed to have an EC50 of 5nM at 5-HT2A with 89% efficacy vs 5-HT, and 100x selectivity over 5-HT2C, while being apparently inactive at the 5-HT2B antitarget.[1]

See also[edit]


  1. ^ US 7655691, Kumaran G, Morency C, Roth B, Sard HP, Shuster L, Xu L, "Indole compounds useful as serotonin selective agents.", published 11 May 2006, assigned to Organix Inc