William Standish Knowles

William Standish Knowles (June 1, 1917 – June 13, 2012) was an American chemist. He was born in Taunton, Massachusetts. Knowles was one of the recipients of the 2001 Nobel Prize in Chemistry. He split half the prize with Ryōji Noyori for their work in asymmetric synthesis, specifically for his work in hydrogenation reactions. 
The other half was awarded to K. Barry Sharpless for his work in oxidation reactions.
Knowles died on June 13, 2012 in Chesterfield, Missouri at the age of 95.