4TX0:
reference: Stereoselective Construction of the 5-Hydroxy Diazabicyclo[4.3.1]decane-2-one Scaffold, a Privileged Motif for FK506-Binding Proteins., Bischoff M, Sippel C, Bracher A, Hausch F, Org Lett. 2014 Oct 17;16(20):5254-7. doi: 10.1021/ol5023195. Epub 2014 Oct 6. PMID: 25286062

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