点击放大Y型-双臂-甲氧基-聚乙二醇-马来酰亚胺（n=45）Y-(mPEG45)2-Mal; Y-shaped bis(methoxy-poly(ethylene glycol)) with a single Mal conjugation handle (PEG arm n=45)
点击放大双臂-聚乙二醇-NHS活性酯（n=45）2-Arm-PEG-CH2CH2COONHS Ester (n=45, per arm); 2-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大四臂-聚乙二醇-NHS活性酯（n=45）4-Arm-PEG45-CH2CH2COONHS Ester; 4-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大三臂-聚乙二醇-NHS活性酯（n=45）3-Arm-PEG-CH2CH2COONHS Ester (n=45, per arm); 3-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大六臂-聚乙二醇-NHS活性酯（n=45）6-Arm-PEG-CH2CH2COONHS Ester (n=45, per arm); 6-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大八臂-聚乙二醇-NHS活性酯（n=45）8-Arm-PEG-CH2CH2COONHS Ester (n=45, per arm); 8-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大环状聚乙二醇-聚乙二醇臂-NHS活性酯（n=45）274-crown-91-PEG45-CH2COONHS Ester; N-hydroxysuccinimide ester-terminated PEG arm on a cyclic poly(ethylene glycol) scaffold (arm n=45)
点击放大双臂-聚乙二醇-羟基（n=45）2-Arm-PEG-OH (n=45, per arm); 2-Arm hydroxyl-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大双臂-聚乙二醇-氨基（n=45）2-Arm-PEG-NH2 (n=45, per arm); 2-Arm primary amine-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大双臂-聚乙二醇-羧乙基（n=45）2-Arm-PEG-CH2CH2COOH (n=45, per arm); 2-Arm carboxylic acid-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
