4-ho-dbt 4-ho-dbt 4-hydroxy-n,n-dibutyltryptamine (4-ho-dbt) is a psychedelic drug belonging to the tryptamine family. it is found either as its crystalline hydrochloride salt or as an oily or crystalline base. 4-ho-dbt was first made by the chemist alexander shulgin and reported in his book tihkal. shulgin reported a dosage of 20 mg orally to be without effects. however this compound has subsequently been sold as a "research chemical" and anecdotal reports suggest that at higher doses 4-ho-dbt is indeed an active hallucinogen, although somewhat weaker than other similar tryptamine derivatives. 4-ho-dbtidentifiers iupac name n-butyl-n-butan-1-amine cas number63065-89-4 npubchem cid21854224chemspider10579818 yuniir3ey4g4blqchemical and physical dataformulac18h28n2omolar mass288.435 g·mol−13d model (jsmol)interactive imagemelting point74 to 75 °c (165 to 167 °f) smiles ccccn(cccc)ccc2cc1cccc(o)c12 inchi inchi=1s/c18h28n2o/c1-3-5-11-20(12-6-4-2)13-10-15-14-19-16-8-7-9-17(21)18(15)16/h7-9,14,19,21h,3-6,10-13h2,1-2h3 ykey:bdojpnjibdxwqq-uhfffaoysa-n y ny (what is this?) (verify) several different isomers of this compound could be made (see dbt for a fuller discussion) but of these only the isobutyl isomer 4-ho-dibt was synthesised by shulgin (mp 152-154 °c) and was also found to be inactive at a 20 mg dose.