Original: Howard Walter Florey , Baron Florey OM , FRS ( 24 September 1898 21 February 1968 ) was an Australian pharmacologist who shared the Nobel Prize in Physiology or Medicine in 1945 with Ernst Boris Chain and Sir Alexander Fleming for his role in the extraction of penicillin .
Simplified: Howard Walter Florey ( November 28 , 1898 -- February 21 , 1968 ) was an Australian scientist who won the Nobel Prize for Medicine in 1945 , for his study into penicillin .