Used in pharmaceutical research as a labeled compound for metabolic studies, helping to trace and understand drug pathways in the body. It serves as a stable isotope-labeled internal standard in mass spectrometry for accurate quantification of metabolites. Applied in the development of new drugs targeting neurological disorders due to its structural similarity to biologically active pyrazine derivatives. Also utilized in the synthesis of deuterated analogs for improved pharmacokinetic and pharmacodynamic profiling in preclinical studies.