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a fungus was discovered with antibacterial action
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the fungus was tested
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a fungus was observed to produce lysis by naming penicillin
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penicillin was purified
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penicillin was used in humans with infections
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the international penicillin unit was established
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the structure of penicillin was discovered
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basic component of penicillin was discovered
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ampicillin was introduced to medicine
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amoxicillin was discovered with a higher degree of gastrointestinal absorption
