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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... Cyanoketone D04.210.500.054.079.429.625 Dehydroepiandrosterone D04.210.500.054.079.429.625.300 Dehydroepiandrosterone Sulfate D04.210.500.054.079.429.824 ...
  2. pdf141-152-1981.pdf 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/141-152-1981.pdf
    ... DNA complex Ddmp Deazauridine Dehydroemetine 2-Deoxycoformycin Dexamethasone Dhea Mustard Dianhydrogalactitol Dibromodulcitol Dichloromethotrexate Diethylstilbestrol Diglycoaldehyde Dihydroxyanthracenedione Dimethylsulfoxide ...