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 D26 Pharmaceutical Preparations D004364 +
  D26.255 Dosage Forms D004304 +
   D26.255.210 Delayed-Action Preparations D003692 
     D26.255.210.315 Drug Implants D004343 
     D26.255.210.860 Tablets, Enteric-Coated D013608 

 D27 Chemical Actions and Uses D020164 +
  D27.720 Specialty Uses of Chemicals D020313 +
   D27.720.280 Dosage Forms D004304 +
    D27.720.280.210 Delayed-Action Preparations D003692 
      D27.720.280.210.315 Drug Implants D004343 
      D27.720.280.210.860 Tablets, Enteric-Coated D013608 

 E02 Therapeutics D013812 +
  E02.319 Drug Therapy D004358 +
   E02.319.300 Drug Delivery Systems D016503 +
    E02.319.300.253 Delayed-Action Preparations D003692