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![[2-(2-hydroxyethoxy)ethyl]urea](/shaoyhuaxue/structure/SY208592.gif)
![4-[(2-methoxyethoxy)carbonyl]-3,5-dimethyl-1H-pyrrole-2-carboxylic acid](/shaoyhuaxue/structure/SY176574.gif)
![2-[(叔丁基二甲基硅基)氧基]乙醇](/shaoyhuaxue/structure/SY041907.gif)
![O-[2-(Boc-氨基)乙基]聚乙二醇](/shaoyhuaxue/structure/SY223912.gif)
![2-[2-(Cbz-氨基)乙氧基]乙醇](/shaoyhuaxue/structure/SY116020.gif)
