Anagrelide-¹³C₂,¹⁵N,d₂ is ¹⁵N and deuterated labeled Anagrelide (HY-B0523). Anagrelide is a potent inhibitor of phosphodiesterase type III (PDE3) (IC₅₀=36?nM). Anagrelide, an imidazoquinazoline derivative, acts as an inhibitor of platelet aggregation. Anagrelide inhibits bone marrow megakaryocytopoiesis. Anagrelide decreases gastrointestinal stromal tumor (GIST) cell proliferation and promotes their apoptosis in vitro. Anagrelide is a platelet-lowering agent and plays in the antithrombopoietic action^[1][2][3].