4-AcO-DMT — AKA synthetic shrooms — is a prodrug of a psychoactive ingredient in magic mushrooms (psilocin).

The experience is virtually indistinguishable from the effects of magic mushrooms, aside from a few subtle subjective differences.

The patents for this tried and tested compound expired decades ago — threatening the work companies like Compass Pathways are doing to monopolize the synthetic psilocybin market over the next 20 years.