发明人黄志刚,林芳,周伟. "一种亚磷酰胺杂质28的合成方法" [P]. 中国发明专利, 专利号 CN 110406584 A, 授权公告日 2021-04-28.
发明人张德明,郑宇鹏,唐晓军. "Method for the Synthesis of Phosphoramidite Impurity 28" [P]. 中国发明专利, 专利号 CN 108174983 A, 授权公告日 2015-10-16.
发明人赵玉洁,李文辉,韩伟. "A Process for Preparing High-Purity Phosphoramidite Impurity 28" [P]. 中国发明专利, 专利号 CN 113087449 A, 授权公告日 2023-04-24.
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