Pyrimidine antimetabolites are commonly used to treat cancer by interfering with DNA replication.1
Parker, William B. (2009). "Enzymology of Purine and Pyrimidine Antimetabolites Used in the Treatment of Cancer". Chem Rev. 109 (7): 2880–2893. doi:10.1021/cr900028p. PMC 2827868. PMID 19476376. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2827868 ↩