5Y4H:
reference: Halistanol sulfates I and J, new SIRT1-3 inhibitory steroid sulfates from a marine sponge of the genus Halichondria., Nakamura F, Kudo N, Tomachi Y, Nakata A, Takemoto M, Ito A, Tabei H, Arai D, de Voogd N, Yoshida M, Nakao Y, Fusetani N, J Antibiot (Tokyo). 2018 Feb;71(2):273-278. doi: 10.1038/ja.2017.145. Epub 2017, Nov 29. PMID: 29184120

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