发明人朱建伟,钱学锋,何建平. "Method for the Synthesis of 4-(3-(Difluoromethoxy)phenyl)-1-methyl-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110353382 B, 授权公告日 2015-12-02.
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