pyr-t pyr-t pyr-t (n,n-tetramethylenetryptamine) is a lesser-known, possible psychedelic drug. pyr-t was first characterized by s. mitzal. toxicity testing was later performed by hunt and brimblecombe, and although a lethal dosage was found in rats, a value is not given. in the book tihkal (tryptamines i have known and loved), neither the dosage nor the duration are reported. pyr-t names preferred iupac name 3--1h-indole other names n,n-tetramethylenetryptamine identifiers cas number 14008-96-9 y 3d model (jsmol) interactive image chemspider 24588 y pubchem cid 26393 unii vz689w7hwx y comptox dashboard (epa) dtxsid00161226 inchi inchi=1s/c14h18n2/c1-2-6-14-13(5-1)12(11-15-14)7-10-16-8-3-4-9-16/h1-2,5-6,11,15h,3-4,7-10h2 ykey: cvtzcblfhngydq-uhfffaoysa-n yinchi=1/c14h18n2/c1-2-6-14-13(5-1)12(11-15-14)7-10-16-8-3-4-9-16/h1-2,5-6,11,15h,3-4,7-10h2key: cvtzcblfhngydq-uhfffaoyae smiles c2c(c1ccccc12)ccn3cccc3 properties chemical formula c14h18n2 molar mass 214.312 g·mol−1 melting point 193 to 194 °c (379 to 381 °f; 466 to 467 k) (hcl salt.) boiling point 170 to 180 °c (338 to 356 °f; 443 to 453 k) (freebase at 0.05mm/hg.) log p 2.74410 vapor pressure 1.02x10−5mmhg except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references pyr-t produces few to no effects in humans, but some behavioral changes were observed in animal tests. very little data exists about the pharmacological properties, metabolism, and toxicity of pyr-t.