Psychedelic experience sources of some psychedelic drugs such as ayahuasca and mescaline-containing cacti are sometimes referred to as "plant teachers". Similarly, in a follow-up to the psilocybin and mysticism study at Johns Hopkins, researchers observed that psilocybin: "occasions personally and spiritually significant mystical experiences that predict long-term changes in behaviors, attitudes and values". Psychedelic experience includes the full range of mystical or religious experiential phenomena. Two scientific studies have concluded that psilocybin (a typical psychedelic compound that occurs naturally in psilocybin mushrooms) reliably triggers mystical-type experiences. The more recent study at Johns Hopkins University identified mystical experiences by means of several questionnaires
O-Acetylpsilocin Franz Troxler. Despite this, psilocetin remains a psychedelic compound with a limited history of use. It is theorized to be a prodrug for psilocin, as is psilocybin, which occurs naturally in most species of hallucinogenic mushrooms. This is because the aromatic acetyl moiety on the 4th position is subject to deacetylation by acidic conditions such as those found in the stomach. Psilocetin is "O"-acetylated psilocin, whereas psilocybin is "O"-phosphorylated. "O"-Acetylpsilocin can be obtained by acetylation of psilocin under alkaline or strongly acidic conditions. It is, therefore, a semi-synthetic compound. It is believed to be a prodrug of psilocin, however, speculation