"4-Acetoxy- N,N -dimethyltryptamine (psilacetin or 4-AcO-DMT) is a synthetic psychedelic tryptamine with close structural similarities to the “magic mushroom” molecules psilocybin and psilocin.
It was developed by the inventor of LSD Albert Hofmann, along with Franz Troxler, for Sandoz Ltd., the company that patented the drug in 1963 (incidentally the same year their LSD patents expired). 
Of the many “grey market” research chemicals out there, 4-AcO-DMT is probably among the safest. At macrodoses, its effects are comparable – although in some ways rather different – to those of psilocybin or psilocin. Most users report a full range of psychedelic visual effects, from color enhancement to vivid hallucinations, along with euphoria, ego loss, and mystical or religious experiences."
And, as with psilocybin, microdoses have been linked to:
- Increased empathy and sociability
- Mood enhancement
- Visual clarity and color enhancement
- Motivation and energy
- Relaxation, peace, and contentedness
- Mental clarity and focus