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John C. Sheehan Born: 1915Birthplace: 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: 1992Fact Monster/Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.
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