发明人刘建华,赵玉洁,周伟. "Method for the Synthesis of Verapamil Impurity 38" [P]. 中国发明专利, 专利号 CN 110816400 A, 授权公告日 2018-07-25.
发明人赵玉洁,沈红梅,王建平. "A Process for Preparing High-Purity Verapamil Impurity 38" [P]. 中国发明专利, 专利号 CN 115330167 B, 授权公告日 2019-09-21.
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