o-4310 o-4310 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. o-4310identifiers iupac name 3--6-fluoro-1-isopropyl-1h-indol-4-ol cas number885671-63-6 ypubchem cid68541087chemspider65322014uniiej3ae64233chemical and physical dataformulac15h21fn2omolar mass264.344 g·mol−13d model (jsmol)interactive image smiles cc(c)n1c2=cc(f)=cc(o)=c2c(ccn(c)c)=c1 inchi inchi=1s/c15h21fn2o/c1-10(2)18-9-11(5-6-17(3)4)15-13(18)7-12(16)8-14(15)19/h7-10,19h,5-6h2,1-4h3key:pauifmsqkohmqt-uhfffaoysa-n