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发明人赵玉洁,胡光,钱学锋. "A Process for Preparing High-Purity 3-Methyl-1-(5-oxohexyl)-3,9-dihydro-1H-purine-2,6-dione (Pentoxifylline impurity)" [P]. 中国发明专利, 专利号 CN 117220603 A, 授权公告日 2021-12-25.
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