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发明人韩伟,郭海燕,唐晓军. "Method for the Synthesis of 5-Amino-1-(4-methylphenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 108269802 A, 授权公告日 2016-01-16.
发明人张德明,马晓峰,冯建国. "A Process for Preparing High-Purity 5-Amino-1-(4-methylphenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 110446533 A, 授权公告日 2016-01-24.
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