All

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 D02 Organic Chemicals D009930 +
  D02.355 Ethers D004987 +
   D02.355.291 Ethers, Cyclic D004988 +
    D02.355.291.411 Epoxy Compounds D004852 +
      D02.355.291.411.400 Epichlorohydrin D004811 
      D02.355.291.411.417 Ethylene Oxide D005027 
      D02.355.291.411.900 Trichloroepoxypropane D014239