点击放大Y型-双臂-甲氧基-聚乙二醇-NHS活性酯（n=24）Y-(mPEG24)2-NHS; Y-shaped bis(methoxy-poly(ethylene glycol)) with a single N-hydroxysuccinimide ester conjugation handle (PEG arm n=24)
点击放大双臂-聚乙二醇-马来酰亚胺（n=24）2-Arm-PEG-Mal (n=24, per arm); 2-Arm Mal-functionalized discrete poly(ethylene glycol) (PEG arm n=24)
点击放大三臂-聚乙二醇-马来酰亚胺（n=24）3-Arm-PEG-Mal (n=24, per arm); 3-Arm Mal-functionalized discrete poly(ethylene glycol) (PEG arm n=24)
点击放大四臂-聚乙二醇-马来酰亚胺（n=24）4-Arm-PEG-Mal (n=24, per arm); 4-Arm Mal-functionalized discrete poly(ethylene glycol) (PEG arm n=24)
点击放大六臂-聚乙二醇-马来酰亚胺（n=24）6-Arm-PEG-Mal (n=24, per arm); 6-Arm Mal-functionalized discrete poly(ethylene glycol) (PEG arm n=24)
点击放大八臂-聚乙二醇-马来酰亚胺（n=24）8-Arm-PEG-Mal (n=24, per arm); 8-Arm Mal-functionalized discrete poly(ethylene glycol) (PEG arm n=24)
点击放大环状聚乙二醇-聚乙二醇臂-马来酰亚胺（n=24）148-crown-49-PEG24-Mal; Mal-terminated PEG arm on a cyclic poly(ethylene glycol) scaffold (arm n=24)
点击放大双臂-聚乙二醇-羟基（n=24）2-Arm-PEG-OH (n=24, per arm); 2-Arm hydroxyl-functionalized discrete poly(ethylene glycol) (PEG arm n=24)
点击放大双臂-聚乙二醇-氨基（n=24）2-Arm-PEG-NH2 (n=24, per arm); 2-Arm primary amine-functionalized discrete poly(ethylene glycol) (PEG arm n=24)
