3OCH:
reference: Chemically Self-Assembled Antibody Nanorings (CSANs): Design and Characterization of an Anti-CD3 IgM Biomimetic., Li Q, So CR, Fegan A, Cody V, Sarikaya M, Vallera DA, Wagner CR, J Am Chem Soc. 2010 Nov 15. PMID: 21077608

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