发明人李文辉,赵玉洁,马晓峰. "Method for the Synthesis of Sulbactam EP Impurity D Potassium Salt" [P]. 中国发明专利, 专利号 CN 111012145 A, 授权公告日 2015-06-16.
发明人高志强,朱建伟,杨光. "A Process for Preparing High-Purity Sulbactam EP Impurity D Potassium Salt" [P]. 中国发明专利, 专利号 CN 113903231 A, 授权公告日 2017-02-12.
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