点击放大环状聚乙二醇-聚乙二醇臂-巯基(n=45)274-crown-91-PEG45-SH; Thiol-terminated PEG arm on a cyclic poly(ethylene glycol) scaffold (arm n=45)
点击放大四臂-聚乙二醇-巯基(n=45)4-Arm-PEG45-SH; 4-Arm thiol-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大双臂-聚乙二醇-巯基(n=45)2-Arm-PEG-SH (n=45, per arm); 2-Arm thiol-functionalized discrete poly(ethylene glycol) (PEG arm n=45)
点击放大三臂-聚乙二醇-巯基(n=45)3-Arm-PEG-SH (n=45, per arm); 3-Arm thiol-functionalized discrete poly(ethylene glycol) (PEG arm n=45)