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Triphenylmethane derivatives
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Patent number 5,413,997
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Issue date May 9, 1995
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Kyowa Hakko Kogyo Co., Ltd.
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Iwao Kinoshita
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C07 - ORGANIC CHEMISTRY
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Pyridine derivatives
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Patent number 5,374,634
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Issue date Dec 20, 1994
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Kyowa Hakko Kogyo Co., Ltd.
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Iwao Kinoshita
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Triphenylmethane derivatives
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Patent number 5,112,867
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Issue date May 12, 1992
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Kyowa Hakko Gogyo Co., Ltd.
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Iwao Kinoshita
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C07 - ORGANIC CHEMISTRY