6EN4:
reference: Structural Basis of Splicing Modulation by Antitumor Macrolide Compounds., Cretu C, Agrawal AA, Cook A, Will CL, Fekkes P, Smith PG, Luhrmann R, Larsen N, Buonamici S, Pena V, Mol Cell. 2018 Apr 19;70(2):265-273.e8. doi: 10.1016/j.molcel.2018.03.011. Epub, 2018 Apr 12. PMID: 29656923

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