Bis-PEG13-NHS ester

• CAT Number: I045985
• CAS Number: 2221949-00-2
• Molecular Formula: C38H64N2O21
• Molecular Weight: 884.92
• Purity: ≥95%
• Synonyms: (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxopyrrolidin-1-yl)oxy-3-oxopropoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
• InChI: InChI=1S/C38H64N2O21/c41-33-1-2-34(42)39(33)60-37(45)5-7-47-9-11-49-13-15-51-17-19-53-21-23-55-25-27-57-29-31-59-32-30-58-28-26-56-24-22-54-20-18-52-16-14-50-12-10-48-8-6-38(46)61-40-35(43)3-4-36(40)44/h1-32H2
• InChIKey: OVDFFVRBNAHLOH-UHFFFAOYSA-N
• SMILES: C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON2C(=O)CCC2=O

Bis-PEG13-NHS ester is a PEG/Alkyl/ether-based PROTAC linker can be used in the synthesis of PROTACs. Bis-PEG13-NHS ester is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs)[1].
PROTACs contain two different ligands connected by a linker; one is a ligand for an E3 ubiquitin ligase and the other is for the target protein. PROTACs exploit the intracellular ubiquitin-proteasome system to selectively degrade target proteins.
ADCs are comprised of an antibody to which is attached an ADC cytotoxin through an ADC linker.

Reference

[1]. John L. Magnani, et al. Highly potent multimeric e-selectin antagonists. WO2018068010A1