3IOD:
reference: A fragment-based approach to probing adenosine recognition sites by using dynamic combinatorial chemistry., Scott DE, Dawes GJ, Ando M, Abell C, Ciulli A, Chembiochem. 2009 Nov 23;10(17):2772-9. PMID: 19827080

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