1RHT:
reference: Proton NMR and structural features of a 24-nucleotide RNA hairpin., Borer PN, Lin Y, Wang S, Roggenbuck MW, Gott JM, Uhlenbeck OC, Pelczer I, Biochemistry 1995 May 16;34(19):6488-503. PMID: 7756280

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