All

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 D02 Organic Chemicals D009930 +
  D02.455 Hydrocarbons D006838 +
   D02.455.326 Hydrocarbons, Acyclic D006839 +
    D02.455.326.271 Alkenes D000475 +
     D02.455.326.271.665 Polyenes D011090 +
      D02.455.326.271.665.616 Polyvinyls D011145 
 D02 Organic Chemicals D009930 +
  D02.455 Hydrocarbons D006838 +
   D02.455.326 Hydrocarbons, Acyclic D006839 +
    D02.455.326.271 Alkenes D000475 +
     D02.455.326.271.884 Vinyl Compounds D014753 +
      D02.455.326.271.884.533 Polyvinyls D011145 
        D02.455.326.271.884.533.532 Polyvinyl Alcohol D011142 
        D02.455.326.271.884.533.565 Polyvinyl Chloride D011143 
        D02.455.326.271.884.533.660 Polyvinylpyridine N-Oxide D011144 
        D02.455.326.271.884.533.699 Povidone D011205 
        D02.455.326.271.884.533.710 Povidone-Iodine D011206 
 D25 Biomedical and Dental Materials D001697 +
  D25.720 Polymers D011108 +
   D25.720.716 Plastics D010969 +
    D25.720.716.721 Polyvinyls D011145 
      D25.720.716.721.616 Polyvinyl Alcohol D011142 
      D25.720.716.721.812 Polyvinyl Chloride D011143 
      D25.720.716.721.838 Povidone D011205