Used in pharmaceutical research as a labeled compound for drug development, particularly in the synthesis of deuterated analogs for metabolic and pharmacokinetic studies. It serves as a building block in the creation of deuterated pyrimidine derivatives, which are valuable in NMR spectroscopy and mass spectrometry for tracing molecular pathways. Additionally, it aids in the study of enzyme mechanisms and drug interactions by providing stable isotope-labeled versions of active pharmaceutical ingredients. Its incorporation into compounds helps improve the understanding of drug stability, bioavailability, and degradation pathways.