Used as a key intermediate in the synthesis of antiviral medications, particularly in the development of nucleoside analogs that inhibit viral replication. Its structure mimics natural nucleotides, allowing it to be incorporated into viral RNA, causing chain termination and suppressing the spread of RNA viruses. It is especially valuable in the production of drugs targeting hepatitis C and other viral infections. The morpholino and phosphate groups enhance cellular uptake and metabolic stability, improving the efficacy of the final drug compound.