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Cephalosporins
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Patent number 4,368,198
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Issue date Jan 11, 1983
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Sumitomo Chemical Company Limited
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Hirotada Yamada
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Cephalosporins
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Patent number 4,302,454
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Issue date Nov 24, 1981
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Sumitomo Chemical Company, Limited
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Hirotada Yamada
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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7-Methoxy cephalosporins
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Patent number 4,226,863
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Issue date Oct 7, 1980
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Sumitomo Chemical Company, Limited
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Hirotada Yamada
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C07 - ORGANIC CHEMISTRY
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