3PX9:
reference: 7-Substituted pterins provide a new direction for ricin A chain inhibitors., Pruet JM, Jasheway KR, Manzano LA, Bai Y, Anslyn EV, Robertus JD, Eur J Med Chem. 2011 May 20. PMID: 21641093

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