5-Chloro-1-(2-fluorophenyl)pentan-2-one is an intermediate in the synthesis of Prasugrel (P701150). Prasugrel is a novel antiplatelet agent; it is a third-generation thienopyridine. Antiplatelet agent Prasugrel showed greater platelet inhibition and decreased incidence of ischemic events than Clopidogrel but may induce increased incidence of bleeding in patient with acute coronary syndrome.