6CYM:
reference: Reversible covalent direct thrombin inhibitors., Sivaraja M, Pozzi N, Rienzo M, Lin K, Shiau TP, Clemens DM, Igoudin L, Zalicki P, Chang SS, Estiarte MA, Short KM, Williams DC, Datta A, Di Cera E, Kita DB, PLoS One. 2018 Aug 2;13(8):e0201377. doi: 10.1371/journal.pone.0201377., eCollection 2018. PMID: 30071045

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