mescaline

/ˈmɛs.kə.liːn/
noun
  1. 1

    A hallucinogenic and intoxicating compound present in the peyote cactus (Lophophora williamsii), the San Pedro cactus (Echinopsis pachanoi), and the Peruvian torch (Echinopsis peruviana).

Source: https://en.wiktionary.org/wiki/mescaline