THP-PEG2-Methyl propionate is a PEG-based PROTAC linker composed of a tetrahydrofuran ether (THP) protecting group, a diethylene glycol (PEG2) flexible segment, and a methyl propionate terminal group. It is produced using chemical synthesis methods, with high-purity preparation achieved through precise control of reaction conditions, and strict adherence to international quality management systems such as ISO 9001. As a key component of PROTAC molecules, its PEG segment imparts good water solubility and flexibility to the molecule. The methyl propionate terminal group can be coupled with target protein ligands or E3 ligase ligands, making it widely applicable in the research and development of targeted protein degradation drugs, cell biology studies, and the development of novel anti-tumor drugs.