1KTS:
reference: Structure-based design of novel potent nonpeptide thrombin inhibitors., Hauel NH, Nar H, Priepke H, Ries U, Stassen JM, Wienen W, J Med Chem 2002 Apr 25;45(9):1757-66. PMID: 11960487

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