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Cysteine derivatives
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Patent number 5,292,926
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Issue date Mar 8, 1994
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Santen Pharmaceutical Co., Ltd.
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Takakazu Morita
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C07 - ORGANIC CHEMISTRY
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Amino acid derivatives
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Patent number 5,214,181
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Issue date May 25, 1993
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Santen Pharmaceutical Co., Ltd.
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Takakazu Morita
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Anti-allergic ophthalmics
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Patent number 5,034,230
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Issue date Jul 23, 1991
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Santen Pharmaceutical Co., Ltd.
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Takakazu Morita
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE