2L8H:
reference: A Small-Molecule Probe Induces a Conformation in HIV TAR RNA Capable of Binding Drug-Like Fragments., Davidson A, Begley DW, Lau C, Varani G, J Mol Biol. 2011 Jul 29;410(5):984-96. PMID: 21763501

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