(S, R, S) -AHPC (VH032-NH2) is the VH032-based VHL ligand used in the recruitment of the von Hippel-Lindau (VHL) protein. (S, R, S) -AHPC can be connected to the ligand for protein (e.g., BCR-ABL1) by a linker to form PROTACs (e.g., GMB-475) . GMB-475 induces the degradation of BCR-ABL1 with an IC50 of 1.11 μM in Ba/F3 cells[1].