点击放大双臂-聚乙二醇-NHS活性酯（n=12）2-Arm-PEG-CH2CH2COONHS Ester (n=12, per arm); 2-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=12)
点击放大三臂-聚乙二醇-NHS活性酯（n=12）3-Arm-PEG-CH2CH2COONHS Ester (n=12, per arm); 3-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=12)
点击放大六臂-聚乙二醇-NHS活性酯（n=12）6-Arm-PEG-CH2CH2COONHS Ester (n=12, per arm); 6-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=12)
点击放大八臂-聚乙二醇-NHS活性酯（n=12）8-Arm-PEG-CH2CH2COONHS Ester (n=12, per arm); 8-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (PEG arm n=12)
点击放大环状聚乙二醇-聚乙二醇臂-NHS活性酯（n=16）100-crown-33-PEG16-CH2COONHS Ester; N-hydroxysuccinimide ester-terminated PEG arm on a cyclic poly(ethylene glycol) scaffold (arm n=16)
点击放大Y型-双臂-甲氧基-聚乙二醇-NHS活性酯（n=16）Y-(mPEG16)2-NHS; Y-shaped bis(methoxy-poly(ethylene glycol)) with a single N-hydroxysuccinimide ester conjugation handle (PEG arm n=16)
点击放大四臂-聚乙二醇-氨基（n=16）4-Arm-PEG16-NH2; 4-Arm primary amine-functionalized discrete poly(ethylene glycol) (PEG arm n=16)
点击放大四臂-聚乙二醇-巯基（n=16）4-Arm-PEG16-SH; 4-Arm thiol-functionalized discrete poly(ethylene glycol) (PEG arm n=16)
点击放大三臂-聚乙二醇-羟基（n=16）3-Arm-PEG16-OH; 3-Arm hydroxyl-functionalized discrete poly(ethylene glycol) (PEG arm n=16)
