2-(2-羟基乙氧基)乙醛

Azido-PEG4-Boc-Hydrazide

ACETICACID,2-OXO-,1,1-DIMETHYLETHYLESTER

四乙二醇二(乙二醇)

叠氮-五聚乙二醇-叠氮

1,4,7,10-Tetraoxacyclododecan-2-one

1,4,7,10,13,16,19-Heptaoxacycloheneicosan-2-one

SPDB

H2N-PEG1-CH2COOtBu

反式环辛烯-四聚乙二醇-活性脂