发明人张德明,胡光,冯建国. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 115205289 A, 授权公告日 2015-05-21.
发明人徐明华,钱学锋,杨光. "Method for the Synthesis of 4-(Tert-butoxycarbonyl)-4-azaspiro[2.4]Heptane-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114178385 A, 授权公告日 2020-02-03.
发明人郭海燕,郑宇鹏,李文辉. "A Process for Preparing High-Purity 4-(Tert-butoxycarbonyl)-4-azaspiro[2.4]Heptane-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108176273 B, 授权公告日 2022-03-04.
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