发明人罗永刚,钱学锋,郭海燕. "Method for the Synthesis of 2-amino-5,7-diazaspiro[3.4]octane-6,8-dione;hydrochloride" [P]. 中国发明专利, 专利号 CN 108128701 A, 授权公告日 2015-08-26.
发明人郑宇鹏,沈红梅,冯建国. "A Process for Preparing High-Purity 2-amino-5,7-diazaspiro[3.4]octane-6,8-dione;hydrochloride" [P]. 中国发明专利, 专利号 CN 114040222 A, 授权公告日 2016-08-05.
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