2L8P:
reference: Solution structure of a DNA duplex containing the potent anti-poxvirus agent cidofovir., Julien O, Beadle JR, Magee WC, Chatterjee S, Hostetler KY, Evans DH, Sykes BD, J Am Chem Soc. 2011 Feb 23;133(7):2264-74. Epub 2011 Jan 31. PMID: 21280608

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