1921 Frederick Soddy
"for his contributions to our knowledge of the chemistry of radioactive substances, and his investigations into the origin and nature of isotopes"
1947 Sir Robert Robinson
"for his investigations on plant products of biological importance, especially the alkaloids"
1956 Sir Cyril Norman Hinshelwood (with Nikolay Nikolaevich Semenov)
"for their researches into the mechanism of chemical reactions"
1964 Dorothy Crowfoot Hodgkin
"for her determinations by X-ray techniques of the structures of important biochemical substances"
1975 John Warcup Cornforth
"for his work on the stereochemistry of enzyme-catalyzed reactions"