title: Chemistry of opioids. Preface.
authors.affiliation: Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Minato-ku, Japan. nagaseh@pharm.kitasato-u.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nagase
mesh_terms: D000701:Analgesics, Opioid / Q000737:chemistry*; D010506:Periodicals as Topic
chemical_list: D000701:Analgesics, Opioid