1MKL:
reference: Structural refinement of the 8,9-dihydro-8-(N7-guanyl)-9-hydroxy-aflatoxin B(1) adduct in a 5'-Cp(AFB)G-3' sequence., Giri I, Jenkins MD, Schnetz-Boutaud NC, Stone MP, Chem Res Toxicol 2002 May;15(5):638-47. PMID: 12018984

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