6E3V:
reference: Mutagenic Replication of the Major Oxidative Adenine Lesion 7,8-Dihydro-8-oxoadenine by Human DNA Polymerases., Koag MC, Jung H, Lee S, J Am Chem Soc. 2019 Mar 20;141(11):4584-4596. doi: 10.1021/jacs.8b08551. Epub, 2019 Mar 7. PMID: 30817143

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