QC-01-175 is a heterobifunctional molecule, which degrades aberrant tau. QC-01-175 reduces the levels of A152T and P301L mutant tau protein and protects neurons from tau-mediated toxicity and improve cell survival (Pink: ligand for target protein Aberrant tau ligand 1 ; Black: linker NH2-PEG3 ; Blue: ligand for E3 ligase Pomalidomide ).