Gerhard Domagk, German pathologist and bacteriologist (b. 1895)
Gerhard Johannes Paul Domagk (German pronunciation: [ˈɡeːɐ̯haʁt ˈdoːmak] (listen); 30 October 1895 – 24 April 1964) was a German pathologist and bacteriologist. He is credited with the discovery of Sulfonamidochrysoidine (KI-730), the first commercially available antibiotic and marketed under the brand name Prontosil, for which he received the 1939 Nobel Prize in Physiology or Medicine.