4TQX:
reference: Molecular basis of Streptococcus mutans sortase A inhibition by the flavonoid natural product trans-chalcone., Wallock-Richards DJ, Marles-Wright J, Clarke DJ, Maitra A, Dodds M, Hanley B, Campopiano DJ, Chem Commun (Camb). 2015 Jun 16;51(52):10483-5. doi: 10.1039/c5cc01816a. PMID: 26029850

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