HDAC4 CHDI Degrader 11 is a potent, selective degrader of HDAC4 (PROTAC) with DC_50 values of 4 nM and 6 nM in Jurkat E6-1 and Jurkat cells, respectively. This compound integrates the class IIa HDAC inhibitor trifluoromethyloxadiazole with a ligand for the Von Hippel-Lindau (VHL) protein through a linker. Demonstrating significant efficacy, HDAC4 CHDI Degrader 11 achieves a DC_50 value of 1 nM in a mouse cell model of Huntingtons disease. For enhanced degradation in neuroblastoma cell lines, it can be administered alongside the P-glycoprotein inhibitor, Elacridar.