Peyton Jacob III is an American chemist and pharmacologist who has studied nicotine, methamphetamine, hallucinogens, entactogens, and other psychoactive drugs.
[1][2] He is a researcher at the University of California, San Francisco (UCSF).
[1][2] Jacob extensively collaborated with and was close friends with Alexander Shulgin.
[3][2] Among many other contributions, they developed the Shulgin Rating Scale together[4] and methylone was first synthesized and described by the pair in the mid-1990s.
[5][6][7]