6CA4:
reference: New fluorescence-based high-throughput screening assay for small molecule inhibitors of tyrosyl-DNA phosphodiesterase 2 (TDP2)., Ribeiro CJA, Kankanala J, Shi K, Kurahashi K, Kiselev E, Ravji A, Pommier Y, Aihara H, Wang Z, Eur J Pharm Sci. 2018 Jun 15;118:67-79. doi: 10.1016/j.ejps.2018.03.021. Epub, 2018 Mar 21. PMID: 29574079

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