All

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 D02 Organic Chemicals D009930 +
  D02.065 Amides D000577 +
   D02.065.589 Lactams D007769 +
    D02.065.589.260 Cephalosporins D002511 +
      D02.065.589.260.150 Cefamandole D002435 +
      D02.065.589.260.160 Cefazolin D002437 
      D02.065.589.260.185 Cefsulodin D002441 
      D02.065.589.260.190 Cephacetrile D002505 +
      D02.065.589.260.200 Cephalexin D002506 +
      D02.065.589.260.210 Cephaloridine D002509 +
      D02.065.589.260.250 Cephamycins D002513 +
      D02.065.589.260.177 Cefonicid D015790