发明人周伟,刘建华,郭海燕. "Method for the Synthesis of 4H,5H,6H,7H-Pyrazolo[1,5-a]pyrazin-2-amine" [P]. 中国发明专利, 专利号 CN 117022537 B, 授权公告日 2020-01-02.
发明人徐明华,唐晓军,胡光. "A Process for Preparing High-Purity 4H,5H,6H,7H-Pyrazolo[1,5-a]pyrazin-2-amine" [P]. 中国发明专利, 专利号 CN 117440871 A, 授权公告日 2019-01-27.
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