2KGP:
reference: Structural basis for stabilization of the tau pre-mRNA splicing regulatory element by novantrone (mitoxantrone)., Zheng S, Chen Y, Donahue CP, Wolfe MS, Varani G, Chem Biol. 2009 May 29;16(5):557-66. PMID: 19477420

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