发明人韩伟,高志强,张德明. "Method for the Synthesis of 1-Azaspiro[4.4]nonane-2,4-dione" [P]. 中国发明专利, 专利号 CN 117036508 A, 授权公告日 2016-10-13.
发明人王建平,胡光,赵玉洁. "A Process for Preparing High-Purity 1-Azaspiro[4.4]nonane-2,4-dione" [P]. 中国发明专利, 专利号 CN 117380764 A, 授权公告日 2023-05-25.
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