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William S Knowles

Nobel medicine pioneer;

Born: June 1, 1917; Died: June 13, 2012.

William S Knowles, who has died aged 95, was a long-time chemist at biotech company Monsanto who shared the Nobel Prize in chemistry.

He retired from Monsanto in 1986 after 44 years with the company. Fifteen years later, he and two other scientists won the Nobel Prize for work that led to discoveries used to make medicines, including antibiotics, heart drugs and widely used treatment for Parkinson's disease. Monsanto said Mr Knowles's research "changed the face of modern medicine".

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