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 D02 Organic Chemicals D009930 +
  D02.540 Lactones D007783 +
   D02.540.505 Macrolides D018942 +
    D02.540.505.250 Erythromycin D004917 +
      D02.540.505.250.250 Erythromycin Estolate D004918 
      D02.540.505.250.630 Roxithromycin D015575 
      D02.540.505.250.260 Erythromycin Ethylsuccinate D015643 
      D02.540.505.250.100 Clarithromycin D017291 
      D02.540.505.250.050 Azithromycin D017963 

 D09 Carbohydrates and Hypoglycemic Agents D002242 +
  D09.203 Carbohydrates D002241 +
   D09.203.408 Glycosides D006027 +
    D09.203.408.477 Macrolides D018942 +
     D09.203.408.477.250 Erythromycin D004917 +
       D09.203.408.477.250.250 Erythromycin Estolate D004918 
       D09.203.408.477.250.630 Roxithromycin D015575 
       D09.203.408.477.250.260 Erythromycin Ethylsuccinate D015643 
       D09.203.408.477.250.100 Clarithromycin D017291 
       D09.203.408.477.250.050 Azithromycin D017963