Title: Etryptamine
CAS Registry Number: 2235-90-7
CAS Name: a-Ethyl-1H-indole-3-ethanamine
Additional Names: 3-(2-aminobutyl)indole; a-ethyltryptamine
Molecular Formula: C12H16N2
Molecular Weight: 188.27
Percent Composition: C 76.55%, H 8.57%, N 14.88%
Literature References: Prepn: Heinzelman et al., J. Org. Chem. 25, 1548 (1960); GB 933786 (1963 to ICI).
Properties: Crystals from ethyl acetate + petr ether, mp 97-99°. uv max: 220.5, 281, 289.5 nm (e 20500, 6000, 5200).
Melting point: mp 97-99°
Absorption maximum: uv max: 220.5, 281, 289.5 nm (e 20500, 6000, 5200)
Derivative Type: Acetate
CAS Registry Number: 118-68-3
Trademarks: Monase (Upjohn)
Molecular Formula: C12H16N2.C2H4O2
Molecular Weight: 248.32
Percent Composition: C 67.71%, H 8.12%, N 11.28%, O 12.89%
Properties: Crystals from ethyl acetate + methanol, mp 165-166°.
Melting point: mp 165-166°
Derivative Type: Hydrochloride
Molecular Formula: C12H16N2.HCl
Molecular Weight: 224.73
Percent Composition: C 64.13%, H 7.62%, N 12.47%, Cl 15.78%
Properties: mp 215.5-218°.
Melting point: mp 215.5-218°
NOTE: This is a controlled substance (hallucinogen): 21 CFR, 1308.11.
Therap-Cat: CNS stimulant.
Keywords: CNS Stimulant.
Status: This monograph has been retired and is no longer subject to revision or update.
Etymemazine Eucalyptol Eucatropine Eugenol Euparin

Systematic (IUPAC) name
Clinical data
Legal status Schedule I (US)
CAS number 2235-90-7 YesY 118-68-3
ATC code None
PubChem CID 8367
DrugBank DB01546
ChemSpider 8064 YesY
Synonyms 3-(2-aminobutyl)indole
Chemical data
Formula C12H16N2 
Mol. mass 188.27 g/mol
Physical data
Melt. point 222–223 °C (432–433 °F)
 YesY (what is this?)  (verify)

α-Ethyltryptamine (α-ET, AET, Monase, or etryptamine) is a psychedelic, stimulant, and entactogenic drug of the tryptamine class.[1] [2] It was originally developed as an antidepressant by workers at Upjohn in the 1960s. [3]