Psilocybin
The first wave of psychedelic exploration in the U.S. surged after American seekers were introduced to the traditional use of psilocybin mushrooms by members of the indigenous Mazatec culture of southern Mexico in the late 1950's. The molecule psilocybin was first isolated from these mushrooms in 1958. Psilocybin has become one of the major focus areas of modern psychedelic research.