3IAA:
reference: Complete set of glycosyltransferase structures in the calicheamicin biosynthetic pathway reveals the origin of regiospecificity., Chang A, Singh S, Helmich KE, Goff RD, Bingman CA, Thorson JS, Phillips GN Jr, Proc Natl Acad Sci U S A. 2011 Oct 25;108(43):17649-54. Epub 2011 Oct 10. PMID: 21987796

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