Klinger H, Thompson G K, Roberts E F. "Method for the Synthesis of N-(Azido-PEG4)-N-bis (PEG4-NHS ester)(97%)" [P]. US Patent, US 9689171 B2, 2019-11-01.
发明人马晓峰,沈红梅,何建平. "A Process for Preparing High-Purity N-(Azido-PEG4)-N-bis (PEG4-NHS ester)(97%)" [P]. 中国发明专利, 专利号 CN 108333367 A, 授权公告日 2020-05-27.
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