Sulfanilamide

Protonsil had certain antibacterial properties but a very complicated structure. Sulfanilamide is a breakdown product of protonsil with some of the same desirable properties. It led to the development of sulfa drugs used to combat various infections.
 Gerhard Domagk Germany 1935 Sulfanilamide

Protonsil had certain antibacterial properties but a very complicated structure. Sulfanilamide is a breakdown product of protonsil with some of the same desirable properties. It led to the development of sulfa drugs used to combat various infections.