4KTL:
reference: Overcoming the Limitations of Fragment Merging: Rescuing a Strained Merged Fragment Series Targeting Mycobacterium tuberculosis CYP121., Hudson SA, Surade S, Coyne AG, McLean KJ, Leys D, Munro AW, Abell C, ChemMedChem. 2013 Jun 20. doi: 10.1002/cmdc.201300219. PMID: 23788280

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