6-Arm-PEG-Biotin (MW 5000)

O=C(NCCC(OCCO[C@@H]([C@@H]([C@H]([C@@H](COCCOC(CCNC(CCCC[C@@H]1SC[C@]([C@]1([H])N2)([H])NC2=O)=O)=O)OCCOC(CCNC(CCCC[C@@H]3SC[C@]([C@]3([H])N4)([H])NC4=O)=O)=O)OCCOC(CCNC(CCCC[C@@H]5SC[C@]([C@]5([H])N6)([H])NC6=O)=O)=O)OCCOC(CCNC(CCCC[C@H]7SC[C@@]([C@@]7([H])N8)([H])NC8=O)=O)=O)COCCOC(CCNC(CCCC[C@@H]9SC[C@]([C@]9([H])N%10)([H])NC%10=O)=O)=O)=O)CCCC[C@@H]%11SC[C@]([C@]%11([H])N%12)([H])NC%12=O.[n].[n].[n].[n].[n].[n]

[1]Scott AW, et al. Universal Biotin-PEG-Linked Gold Nanoparticle Probes for the Simultaneous Detection of Nucleic Acids and Proteins. Bioconjug Chem. 2017 Jan 18;28 (1) :203-211.