发明人杨光,周伟,钱学锋. "Method for the Synthesis of tert-butyl N-({1-methyl-4-oxo-1H,4H,5H-pyrazolo[3,4-d]pyrimidin-6-yl}methyl)carbamate" [P]. 中国发明专利, 专利号 CN 114576319 A, 授权公告日 2021-10-17.
发明人徐明华,高志强,林芳. "A Process for Preparing High-Purity tert-butyl N-({1-methyl-4-oxo-1H,4H,5H-pyrazolo[3,4-d]pyrimidin-6-yl}methyl)carbamate" [P]. 中国发明专利, 专利号 CN 108453723 A, 授权公告日 2021-01-14.
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