title: Planning and serendipity in the search for a nonaddicting opiate analagesic.
authors.forename: C J
authors.initials: CJ
authors.lastname: Acker
mesh_terms: D018712:Analgesics, Non-Narcotic / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D009892:Opium / Q000266:history; D012107:Research Design
chemical_list: D018712:Analgesics, Non-Narcotic; D009892:Opium