发明人张德明,陈志强,郑宇鹏. "Method for the Synthesis of (6-Oxopyrazolo[1,5-a]pyrido[3,4-e]pyrimidin-7(6H)-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 109491935 B, 授权公告日 2025-09-17.
Schröder R, Kowalski A, Jørgensen K. "A Process for Preparing High-Purity (6-Oxopyrazolo[1,5-a]pyrido[3,4-e]pyrimidin-7(6H)-yl)acetic acid" [P]. European Patent, EP 3643040 A1, 2021-04-10.
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