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Penicillin derivative
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Patent number 4,540,689
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Issue date Sep 10, 1985
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Kureha Kagaku Kogyo Kabushiki Kaisha
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Shigeaki Muto
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C07 - ORGANIC CHEMISTRY
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Cephalosporin derivative
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Patent number 4,496,561
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Issue date Jan 29, 1985
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Kureha Kagaku Kogyo Kabushiki Kaisha
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Shigeaki Muto
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C07 - ORGANIC CHEMISTRY
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Cephem compounds
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Patent number 4,308,381
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Issue date Dec 29, 1981
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Takeda Chemical Industries, Ltd.
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Susumu Tsushima
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C07 - ORGANIC CHEMISTRY
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