O-Desmethyl Midostaurin is primarily used in the field of medical research and drug development. It is a metabolite of Midostaurin, a drug used to treat certain types of leukemia. Researchers study O-Desmethyl Midostaurin to better understand the pharmacokinetics and pharmacodynamics of Midostaurin. This helps in optimizing the therapeutic efficacy and safety profile of the parent drug. Additionally, it is used in clinical trials to assess its potential role in cancer therapy, particularly in cases where resistance to Midostaurin is observed. Understanding its behavior in the body also aids in the development of new formulations and dosage regimens for improved patient outcomes.