Used primarily in the development of antiviral drugs, particularly for treating RNA virus infections. It serves as a nucleoside analog that inhibits viral replication by incorporating into viral RNA, causing chain termination. This mechanism is crucial in the treatment of diseases caused by viruses like hepatitis C and certain respiratory viruses. Additionally, it is researched for its potential in cancer therapy, where it can disrupt the synthesis of DNA in rapidly dividing cancer cells. Its fluorinated structure enhances its stability and bioavailability, making it a valuable component in medicinal chemistry.