发明人孙丽萍,胡光,郑宇鹏. "一种维拉帕米EP杂质C的合成方法" [P]. 中国发明专利, 专利号 CN 113639105 A, 授权公告日 2023-04-06.
发明人张德明,林芳,胡光. "Method for the Synthesis of Verapamil EP Impurity C" [P]. 中国发明专利, 专利号 CN 114033632 A, 授权公告日 2022-11-17.
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