Percy Julian (1953) - Virtual Tour Of Illinois History (sitios de interés)
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Percy Lavon Julian (April 11, 1899 – April 19, 1975) was an American research chemist and a pioneer in the chemical synthesis of medicinal drugs from plants. He was the first to synthesize the natural product physostigmine. While at Glidden, his chemical synthesis of human steroids from plant steroid precursors would lay the foundation for the birth control pill and cortisone. http://en.wikipedia.org/wiki/Percy_Lavon_Julian