5MWI:
reference: Stabilization of RNA hairpins using non-nucleotide linkers and circularization., Kiliszek A, Blaszczyk L, Kierzek R, Rypniewski W, Nucleic Acids Res. 2017 Feb 21. doi: 10.1093/nar/gkx122. PMID: 28334744

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