title: The kappa-active oxygen in the opioid pharmacophore of some benzomorphans: charges, proton affinities and binding modelling.
mesh_terms: D001575:Benzomorphans / Q000378:metabolism*; D004563:Electrochemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009019:Morphinans / Q000378:metabolism*; D010100:Oxygen; D011522:Protons; D011957:Receptors, Opioid / Q000378:metabolism*; D017473:Receptors, Opioid, kappa
chemical_list: D001575:Benzomorphans; D009019:Morphinans; D011522:Protons; D011957:Receptors, Opioid; D017473:Receptors, Opioid, kappa; D010100:Oxygen