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 Medical Concepts
  Chemicals and Drugs
 Organic Chemicals
 Hydrocarbons
 Hydrocarbons, Cyclic
 Hydrocarbons, Aromatic
 Polycyclic Hydrocarbons, Aromatic
 Naphthacenes
 Tetracyclines
 Chlortetracycline
 Demeclocycline
 Doxycycline
 Lymecycline
 Methacycline
 Minocycline
 Oxytetracycline
 Rolitetracycline
 Tetracycline

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