3PO1:
reference: Discovery of benzothiazole guanidines as novel inhibitors of thrombin and trypsin IV., Karle M, Knecht W, Xue Y, Bioorg Med Chem Lett. 2012 Jul 15;22(14):4839-43. Epub 2012 May 17. PMID: 22726924

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