Pelletier, Pierre Joseph (pyĕr zhôzĕfˈ pĕlətyāˈ) [key], 1788–1842, French chemist. With J. B. Caventou, he was cofounder of alkaloid chemistry and codiscoverer of quinine, strychnine, brucine, and other alkaloids. He also isolated such other substances as picrotoxin, caffeine, and piperine. He was especially noted for his introduction of new methods of generating organic substances.
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