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CAS number 246-87-2
ChemSpider 26633897
Jmol-3D images Image 1
Molecular formula C15H20N2O2
Molar mass 260.33 g mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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4-Acetoxy-MET (4-Acetoxy-N-methyl-N-ethyltryptamine), also known as metacetin or 4-AcO-MET, is a hallucinogenic tryptamine. It is the acetate ester of 4-HO-MET, and a homologue of 4-AcO-DMT. It is a novel compound with very little history of human use. It is sometimes sold as a research chemical by online retailers.

It is expected that the compound is quickly hydrolyzed into the free phenolic 4-HO-MET by serum esterases, but human studies concerning the metabolic fate of this drug are lacking.[citation needed] There is proof that this is a very active substance.[citation needed]


4-Acetoxy-MET is unscheduled in the United States, but possession and sales of 4-Acetoxy-MET could possibly be prosecuted under the Federal Analog Act if intent to consume can be proven because of its structural similarities to psilocin.