4CWD:
reference: Oxygenase-Catalyzed Desymmetrization of N,N-Dialkyl-piperidine-4-carboxylic Acids., Rydzik AM, Leung IK, Kochan GT, McDonough MA, Claridge TD, Schofield CJ, Angew Chem Int Ed Engl. 2014 Oct 6;53(41):10925-7. doi: 10.1002/anie.201406125., Epub 2014 Aug 27. PMID: 25164544

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