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  1. pdfNLM Technical Bulletin, no.117-128 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/117-128-1979.pdf
    ... 1 COBALTOUS CARBONATE 513-65-9 2,3-BUTANEDIOL 513-66-0 ACETOIN 520-45-6 DEHYDROACETIC ... 3 MERCURIC BENZOATE 584-03-2 1.2-BUTANEDIOL fDL) 584-08-7 POTASSIUM CARBONATE 5S4-79- ...
  2. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... D02.033.455 Glycols D02.033.455.125 Butylene Glycols D02.033.455.125.125 Busulfan D02.033. ...