发明人杨光,罗永刚,朱建伟. "Method for the Synthesis of Ethyl 4-hydroxy-6-methylpyrazolo[1,5-a]pyrazine-2-carboxylate, 97%" [P]. 中国发明专利, 专利号 CN 116154759 B, 授权公告日 2020-12-01.
发明人马晓峰,徐明华,周伟. "A Process for Preparing High-Purity Ethyl 4-hydroxy-6-methylpyrazolo[1,5-a]pyrazine-2-carboxylate, 97%" [P]. 中国发明专利, 专利号 CN 114784948 A, 授权公告日 2020-12-09.
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