发明人赵玉洁,冯建国,高志强. "Method for the Synthesis of Bupivacaine EP Impurity B" [P]. 中国发明专利, 专利号 CN 116798966 A, 授权公告日 2019-04-26.
发明人周伟,徐明华,韩伟. "A Process for Preparing High-Purity Bupivacaine EP Impurity B" [P]. 中国发明专利, 专利号 CN 116073678 B, 授权公告日 2021-08-13.
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