发明人马晓峰,唐晓军,罗永刚. "Method for the Synthesis of Bis-PEG21-NHS ester" [P]. 中国发明专利, 专利号 CN 108569447 A, 授权公告日 2021-01-03.
发明人黄志刚,郭海燕,何建平. "A Process for Preparing High-Purity Bis-PEG21-NHS ester" [P]. 中国发明专利, 专利号 CN 111679460 B, 授权公告日 2019-02-09.
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