发明人罗永刚,高志强,陈志强. "一种恩他卡朋杂质48的合成方法" [P]. 中国发明专利, 专利号 CN 116031584 A, 授权公告日 2021-07-21.
发明人冯建国,朱建伟,沈红梅. "Method for the Synthesis of Entacapone impurity 48" [P]. 中国发明专利, 专利号 CN 112639088 B, 授权公告日 2021-02-18.
发明人林芳,罗永刚,高志强. "A Process for Preparing High-Purity Entacapone impurity 48" [P]. 中国发明专利, 专利号 CN 112507287 A, 授权公告日 2017-12-20.
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