发明人钱学锋,杨光,郑宇鹏. "Method for the Synthesis of 1-methyl-1H-pyrazolo[3,4-d]pyrimidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116801556 A, 授权公告日 2017-07-21.
发明人郭海燕,赵玉洁,韩伟. "A Process for Preparing High-Purity 1-methyl-1H-pyrazolo[3,4-d]pyrimidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117670479 B, 授权公告日 2018-09-25.
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