Brown S R, Kumar R, Williams B T. "Method for the Synthesis of 5-(2-Ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one" [P]. US Patent, US 10546456 B2, 2024-09-22.
发明人马晓峰,陈志强,沈红梅. "A Process for Preparing High-Purity 5-(2-Ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one" [P]. 中国发明专利, 专利号 CN 115617780 B, 授权公告日 2024-02-17.
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