发明人何建平,钱学锋,李文辉. "Method for the Synthesis of 4,7-diazaspiro[2.5]octan-6-one" [P]. 中国发明专利, 专利号 CN 114804135 A, 授权公告日 2016-07-12.
发明人刘建华,李文辉,马晓峰. "A Process for Preparing High-Purity 4,7-diazaspiro[2.5]octan-6-one" [P]. 中国发明专利, 专利号 CN 111574234 B, 授权公告日 2023-09-05.
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