3F75:
reference: Toxoplasma gondii cathepsin L is the primary target of the invasion-inhibitory compound morpholinurea-leucyl-homophenyl-vinyl sulfone phenyl., Larson ET, Parussini F, Huynh MH, Giebel JD, Kelley AM, Zhang L, Bogyo M, Merritt EA, Carruthers VB, J Biol Chem. 2009 Sep 25;284(39):26839-50. Epub 2009 Jul 13. PMID: 19596863

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).