sulfanilamide
noun
sul·fa·nil·amide ˌsəl-fə-ˈni-lə-ˌmīd 
-məd
-məd : a crystalline sulfonamide C6H8N2O2S that is the parent compound of most of the sulfa drugs
Example Sentences
Recent Examples on the Web The experience of children who were born with severe disabilities from thalidomide in the 1950s and ’60s, like that of the victims of sulfanilamide poisoning in the ’30s, prompted significant strengthening of government oversight. 
Benjamin Mazer, The Atlantic, 13 July 2021 Geiling and his lab of graduate students, including Kelsey, set out to determine what exactly in the elixir was killing people: the solvent, the flavor or the sulfanilamide. Leila Mcneill, Smithsonian, 8 May 2017
Benjamin Mazer, The Atlantic, 13 July 2021 Geiling and his lab of graduate students, including Kelsey, set out to determine what exactly in the elixir was killing people: the solvent, the flavor or the sulfanilamide. Leila Mcneill, Smithsonian, 8 May 2017 Word History
Etymology
sulfanilic acid (C6H7NO3S, from International Scientific Vocabulary sulf- + aniline + -ic) + amide
First Known Use
1937, in the meaning defined above
Medical Definition
sulfanilamide
noun
sul·fa·nil·amide
variants or chiefly British sulphanilamide
ˌsəl-fə-ˈnil-ə-ˌmīd -məd
-məd : a crystalline sulfonamide C6H8N2O3S that is the amide of sulfanilic acid and the parent compound of most of the sulfa drugs