Clinical data
Other namesβ-Methylamphetamine
CAS Number
PubChem CID
CompTox Dashboard (EPA)
Chemical and physical data
Molar mass149.237 g·mol−1
3D model (JSmol)

2-Phenyl-3-aminobutane (also known as β-methylamphetamine) is a stimulant of the phenethylamine class that is closely related to its α-methyl analog Pentorex.[1] It was first synthesized by the German scientists Felix Haffner and Fritz Sommer in 1939 as a stimulant with milder effects, shorter duration, lower toxicity and fewer side effects compared to previously known drugs such as amphetamine.[2]

2-Phenyl-3-aminobutane is banned in some countries as a structural isomer of methamphetamine.

See also[edit]


  1. ^ Jared Ledgard (2007). A Laboratory History of Narcotics, Vol. 1 Amphetamines and Derivatives. Lulu.com. p. 81. ISBN 0615156940.
  2. ^ Felix Haffner, Fritz Sommer (22 August 1944). "Patent US 2356582 A - Stimulants suitable for combating symptoms of fatigue and process for their production". Retrieved 25 July 2015.