4-aco-dmt, O-Acetylpsilocin is a semi-synthetic psychoactive drug that 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
4-acetoxy DMT is an O-acetylated psilocin that is believed to be a synthetic prodrug of psilocin, the psychedelic hallucinogen derived from various mushrooms.