发明人林芳,张德明,徐明华. "Method for the Synthesis of Ethyl 1-ethyl-4-hydroxy-6-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate" [P]. 中国发明专利, 专利号 CN 112774650 A, 授权公告日 2023-11-25.
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