3UDE:
reference: Bisubstrate analogue inhibitors of 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase: New design with improved properties., Shi G, Shaw G, Liang YH, Subburaman P, Li Y, Wu Y, Yan H, Ji X, Bioorg Med Chem. 2012 Jan 1;20(1):47-57. Epub 2011 Nov 23. PMID: 22169600

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