Keywords: Nalorphine.svg Skeletal formula of nalorphine N-allyl-normorphine Orientation made to match Image Codein - Codeine svg by NEUROtiker Created using http //www acdlabs com/download/chemsk html ACD/ChemSketch 10 0 and Inkscape Own 2007-08-10 Fvasconcellos 18 57 10 August 2007 UTC Allyl compounds Morphinans Opioid antagonists |