Yamamoto T, Mueller T, Fischer A B. "Method for the Synthesis of 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one" [P]. US Patent, US 10768256 B2, 2023-12-13.
发明人刘建华,马晓峰,赵玉洁. "A Process for Preparing High-Purity 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one" [P]. 中国发明专利, 专利号 CN 116023439 A, 授权公告日 2017-01-01.
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