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Alexander Fleming noticed a mold growing on a culture plate, and identified the substance as bacterial growth.
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A biochemical research team made by Howard Florey produced stable penicillin
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Dorothy Hodgkin corrected the chemical formula of penicillin
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Ernst Brandl and Hans Margreiter developed the first acid-stable penicillin for oral administration.
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John Sheehan developed the first chemical synthesis of penicillin
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