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3845152
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C07 - ORGANIC CHEMISTRY
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C07 - ORGANIC CHEMISTRY
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3697448
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C07 - ORGANIC CHEMISTRY
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C07 - ORGANIC CHEMISTRY
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C07 - ORGANIC CHEMISTRY
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3507928
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C07 - ORGANIC CHEMISTRY
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C07 - ORGANIC CHEMISTRY
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3248449
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Patent number 3,248,449
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C07 - ORGANIC CHEMISTRY
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C07 - ORGANIC CHEMISTRY
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C07 - ORGANIC CHEMISTRY
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1914674
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C07 - ORGANIC CHEMISTRY