发明人杨光,罗永刚,王建平. "Method for the Synthesis of NHS-dPEG<SUP>®</SUP><SUB>4</SUB>-( m-dPEG<SUP>®</SUP><SUB>12</SUB>)<SUB>3</SUB>- ester" [P]. 中国发明专利, 专利号 CN 111279490 B, 授权公告日 2020-03-28.
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