2RCX:
reference: Structure-based optimization of cephalothin-analogue boronic acids as beta-lactamase inhibitors., Morandi S, Morandi F, Caselli E, Shoichet BK, Prati F, Bioorg Med Chem. 2007 Nov 6;. PMID: 17997318

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