发明人唐晓军,陈志强,何建平. "Method for the Synthesis of 6-Isobutyl-2-methyl-5-thioxo-5,6-dihydro-2H-pyrazolo[4,3-d]pyrimidin-7(4H)-one" [P]. 中国发明专利, 专利号 CN 116325570 A, 授权公告日 2021-09-04.
Schröder R, Lefèvre J P, Kowalski A. "A Process for Preparing High-Purity 6-Isobutyl-2-methyl-5-thioxo-5,6-dihydro-2H-pyrazolo[4,3-d]pyrimidin-7(4H)-one" [P]. European Patent, EP 3114986 A1, 2020-04-25.
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