CAS Number 4822-13-3
ChemSpider 19718 YesY
Chemical and physical data
Formula C13H18N2O
Molar mass 218.2948
3D model (Jmol) Interactive image

Alpha,N,O-TMS, or α,N-dimethyl-5-methoxytryptamine, is a lesser-known psychedelic drug. Its abbreviated nomenclature is derived from its structure, as it is α,N,O-trimethyl serotonin. α,N,O-TMS was first synthesized by Alexander Shulgin. In his book TiHKAL (Tryptamines I Have Known and Loved), Shulgin lists the dosage as 10-20 mg when taken orally, and the duration as 6-8 hours.[1]


  1. Shulgin, Alexander; Ann Shulgin (September 1997). TiHKAL: The Continuation. Berkeley, California: Transform Press, 425. ISBN 0-9630096-9-9. OCLC 38503252.

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