title: Importance of the nitrogen lone electron pair orientation in stereospecific opiates.
mesh_terms: D000700:Analgesics; D001665:Binding Sites; D004583:Electrons; D008968:Molecular Conformation; D009019:Morphinans; D011955:Receptors, Drug; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: D000700:Analgesics; D009019:Morphinans; D011955:Receptors, Drug