点击放大环状聚乙二醇-聚乙二醇臂-羧甲基(n=4)28-crown-9-PEG4-CH2COOH; Carboxylic acid-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-NHS活性酯(n=4)28-crown-9-PEG4-CH2COONHS Ester; N-hydroxysuccinimide ester-terminated PEG arm on a cyclic poly(ethylene glycol) scaffold (arm n=4)