John C. Sheehan
John C. SheehanBorn: 1915
Birthplace: Battle Creek, Mich.
Semi-synthetic penicillin?For almost 30 years after Sir Alexander Fleming's discovery of penicillin, the process for harvesting the drug took months to generate a small amount. Sheehan succeeded in a general total synthesis of the antibiotic. (1995)Died: 1992
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