PROTAC α-synuclein degrader 3 (Compound 5) is a selective α-synuclein PROTAC degrader. PROTAC α-synuclein degrader 3 can promote the ubiquitination and degradation of α-synuclein. PROTAC α-synuclein degrader 3 can be used for Parkinson's disease research (Pink: target protein ligand ; Black: linker; HY-133302; Blue: E3 ligase VHL ligand (HY-112078) ).