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Medical Concepts
Chemicals and Drugs
Polycyclic Compounds
Polycyclic Hydrocarbons, Aromatic
Phenanthrenes
Morphinans
Benzomorphans
Buprenorphine
Butorphanol
Dextromethorphan
Dextrorphan
Diprenorphine
Etorphine
Levallorphan
Levorphanol
Morphine
Morphine Derivatives
Nalbuphine
Nalorphine
Naloxone
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Medical Concepts Medical Concepts Chemicals and Drugs