发明人刘建华,唐晓军,孙丽萍. "Method for the Synthesis of 2-Azaspiro[3.3]heptane oxalate" [P]. 中国发明专利, 专利号 CN 115413606 A, 授权公告日 2016-04-08.
发明人罗永刚,钱学锋,何建平. "A Process for Preparing High-Purity 2-Azaspiro[3.3]heptane oxalate" [P]. 中国发明专利, 专利号 CN 114583924 B, 授权公告日 2020-08-04.
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