发明人何建平,周伟,张德明. "一种2-氧杂-6-氮杂螺[3.3]庚烷半草酸盐的合成方法" [P]. 中国发明专利, 专利号 CN 110594974 A, 授权公告日 2020-09-25.
发明人周伟,唐晓军,孙丽萍. "Method for the Synthesis of 2-Oxa-6-azaspiro[3.3]heptane Hemioxalate" [P]. 中国发明专利, 专利号 CN 110099546 A, 授权公告日 2024-10-23.
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