4-ACO-DMT (also known as O-Acetylpsilocin, 4-Acetoxy-DMT, or Psilacetin) is a synthetically produced psychedelic tryptamine. It is the acetylated form of the psilocybin mushroom alkaloid psilocin and is a lower homolog of 4-AcO-DET, 4-AcO-MiPT and 4-AcO-DiPT. The compound has been suggested by David Nichols to be a potentially useful alternative to psilocybin for pharmacological studies as they are both believed to be prodrugs of psilocin.[1] Its structural similarities to psilocin and psilocybin results in an identical subjective effect profile and the three compounds can be said to feel indistinguishable from each other. This allows 4-AcO-DMT to function as a perfect substitute for psilocybin mushrooms.