Psilocybin, psilocin, and baeocystin/norbaeocystin are naturally occurring psychedelics of the tryptamin type, which until now could only be detected in fungal organisms. The compounds are present in various fungi, including and especially in the genus psilocybe, which is disseminated worldwide. In the human body, psilocybin/psilocin connect to the serotonin receptors, because the substances are similar to serotonin (5-hydroxytryptamine) by the chemical structure. It was no less than LSD inventor Dr. Albert Hofmann, who extracted and isolated the entheogenic tryptamines from Psilocybe Mexicana and Psilocybe cubensis in 1955 and and gave them the name of psilocybin and psilocin.
These two substances can be mentioned within the same breath. Because psilocybin in the human body is metabolized to psilocin by removal of a phosphate group, which is a potent entheogen and induces an effect similar to the semi-synthetic LSD and comparatively low doses of natural N, N-dimethyltryptamine (DMT). Psilocybin and psilocin are indole alkaloids and belong to the class of tryptamines.
Baeocystin (= N-Norpsilocybin) and norbaeocystin are weakly effective hallucinogens and belong to the class of tryptamines as well. According to the state of knowledge today, baeocystin and norbaeocystin are only found in fungi and mostly occur in connection with the psilocybin/psilocin complex.