2XNE:
reference: Structure-based design of imidazo[1,2-a]pyrazine derivatives as selective inhibitors of Aurora-A kinase in cells., Bouloc N, Large JM, Kosmopoulou M, Sun C, Faisal A, Matteucci M, Reynisson J, Brown N, Atrash B, Blagg J, McDonald E, Linardopoulos S, Bayliss R, Bavetsias V, Bioorg Med Chem Lett. 2010 Oct 15;20(20):5988-93. Epub 2010 Aug 21. PMID: 20833547

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