点击放大环状聚乙二醇-聚乙二醇臂-羟基（n=4）28-crown-9-PEG4-OH; Hydroxyl-terminated PEG arm on a cyclic poly(ethylene glycol) scaffold (arm n=4)
点击放大环状聚乙二醇-聚乙二醇臂-炔基（n=4）28-crown-9-PEG4-Alkyne; Terminal alkyne-terminated PEG arm on a cyclic poly(ethylene glycol) scaffold (arm n=4)
