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Preferred IUPAC name
Other names
3D model (JSmol)
  • InChI=1S/C14H18N2O/c17-13-5-3-4-12-14(13)11(10-15-12)6-9-16-7-1-2-8-16/h3-5,10,15,17H,1-2,6-9H2 checkY
  • Oc2cccc3[nH]cc(CCN1CCCC1)c23
Molar mass 230.311 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

4-HO-pyr-T (4-hydroxy-N,N-tetramethylenetryptamine) is a lesser-known psychedelic drug. It is the 4-hydroxyl analog of pyr-T. 4-HO-pyr-T was first synthesized by Alexander Shulgin. In his book TiHKAL (Tryptamines I Have Known and Loved), neither the dosage nor the duration are reported.[1] 4-HO-pyr-T produces few to no effects. Very little data exists about the pharmacological properties, metabolism, and toxicity of 4-HO-pyr-T.


  1. ^ "Erowid Online Books : "TIHKAL" - #24 4-HO-PYR-T". Retrieved 2018-03-20.