2N5O:
reference: Using NMR and molecular dynamics to link structure and dynamics effects of the universal base 8-aza, 7-deaza, N8 linked adenosine analog., Spring-Connell AM, Evich MG, Debelak H, Seela F, Germann MW, Nucleic Acids Res. 2016 Aug 26. pii: gkw736. PMID: 27566150

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