DDO3711, a PP5-recruiting phosphatase recruitment chimera (PHORC), is created by chemically linking an apoptosis signal-regulated kinase 1 (ASK1) inhibitor with a PP5 activator. This compound selectively targets ASK1 (IC50=164.1 nM) over ASK2 (IC50 >20 μM), effectively dephosphorylating p-ASK1 T838 through PP5 recruitment. Exhibiting ASK1-dependent antiproliferative properties, DDO3711 demonstrates anti-cancer activity, making it a promising agent for research into the abnormal phosphorylation of oncoproteins.