3H4V:
reference: Discovery of potent pteridine reductase inhibitors to guide antiparasite drug development., Cavazzuti A, Paglietti G, Hunter WN, Gamarro F, Piras S, Loriga M, Allecca S, Corona P, McLuskey K, Tulloch L, Gibellini F, Ferrari S, Costi MP, Proc Natl Acad Sci U S A. 2008 Feb 5;105(5):1448-53. Epub 2008 Feb 1. PMID: 18245389

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