发明人刘建华,林芳,周伟. "Method for the Synthesis of 3-Methyl-8-(4-phenylpiperazin-1-yl)-3,9-dihydro-1h-purine-2,6-dione" [P]. 中国发明专利, 专利号 CN 110173746 B, 授权公告日 2021-09-01.
Mueller T C, Nowak P, Kowalski A. "A Process for Preparing High-Purity 3-Methyl-8-(4-phenylpiperazin-1-yl)-3,9-dihydro-1h-purine-2,6-dione" [P]. European Patent, EP 3955584 A1, 2017-10-17.
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